Predictions

Season 21:
TCEC Leagues Season 21
These are the TCEC chatters who have staked 250 000 trollbits (the maximum) on at least one game during the league season:

masterkni6, naphtha42, mrbdzz, leela_is_the_goddess, heyimBigo, BelgradeGambit, drspod, Viren6, digretion, 1coghoti, SF_is_a_GOD, Lolligerhans, RobbyRobbyRob, imelbook, creyzamo, BumfluffBob, Wolfgang_de_Cauter, kanchess, Linisten, opinternet, Remnant_of_Fishcooking, tracycage, vujazzman, linilly, quackquackblah, windfishballad, Jeydra, cookie_monster_71, kiudee, wissam512, platyhelminth, MandelSet, FirebrandX, coolconqueror, frodi6768.

These are the TCEC chatters who have lost 250K for the greater good. Numbers behind their name indicate how often they have done so:

heyimBigo (2x), mrbdzz (8x), imelbook, BelgradeGambit (7x), leela_is_the_goddess, kanchess (4x), SF_is_a_GOD (3x), opinternet, tracycage, windfishballad (3x), drspod (3x), cookie_monster_71, kiudee, quackquackblah (6x) , vujazzman (3x), linilly, platyhelminth, MandelSet, FirebrandX, naphtha42 (2x), 1coghoti, frodi6768.

TCEC Cup 9
These are the TCEC chatters who have staked 250 000 trollbits (the maximum) on at least one game in Cup 9:

ddarthez, mrbdzz, thecoal_baker, wissam512, kittenkaboodle, coolconqueroriii, RobbyRobbyRob, heyimBigo, jjlai1111, digretion, BelgradeGambit, ChessEAlly, 1coghoti.

These are the TCEC chatters who have lost 250K for the greater good. Numbers behind their name indicate how often they have done so:

mrbdzz (1x), heyimBigo (1x), BelgradeGambit (1x), thecoal_baker (1x), kittenkaboodle (1x), 1coghoti (1x).

TCEC Swiss 2
These are the TCEC chatters who have staked 250 000 trollbits (the maximum) on at least one game in Swiss 2:

ChessEAlly, Archstro, masterkni6, mrbdzz, coolconqueroriii, RobbyRobbyRob, ddarthez, thecoal_baker, quackquackblah, jjlai1111, gmmds27, Lolligerhans, polotovarman, AlcyonEldara, linilly

These are the TCEC chatters who have lost 250K for the greater good. Numbers behind their name indicate how often they have done so:

ddarthez (1x), thecoal_baker (1x), mrbdzz (2x), Archstro (1x), gmmds27 (2x), quackquackblah (1x), jjlai1111 (2x), coolconqueroriii (1x), AlcyonEldara (1x), 1coghoti (1x)

TCEC FRC 4
These are the TCEC chatters who have staked 250 000 trollbits (the maximum) on at least one game in FRC4:
1coghoti, Archstro, BelgradeGambit, ccls, coolconqueroriii, ddarthez, digretion, heyimBigo, jjlai1111, kanchess, linilly, Linisten, masterkni6, mrbdzz, naphtha42, polotovarman, quackquackblah, RobbyRobbyRob, steinebox18l, thecoal_baker

These are the TCEC chatters who have lost 250K for the greater good. Numbers behind their name indicate how often they have done so:
polotovarman (1x), kanchess (1x), Archstro (1x), linilly (1x), heyimBigo (1x), mrbdzz (4x), thecoal_baker (3x), coolconqueroriii (2x), quackquackblah (1x) jjlai1111 (1x), 1coghoti (1x), ChessEAlly (1x), steinebox18l (1x)

These are the chatters who have achieved the heroic grand slam of losing at least one 250k bet in each of the main events of Season 21:
mrbdzz, 1coghoti

Season 22:
TCEC Leagues Season 22
These are the TCEC chatters who have staked 250 000 trollbits (the maximum) on at least one game during the league season:
RobbyRobbyRob (129x), kanchess (18x), digretion (12x), jjlai1111 (23x), cylenty61 (6x), Archstro (31x), thecoal_baker (4x), steinebox18l (12x), kittenkaboodle (21x), PawnMasseur (66x), xtm2212 (3x), AlcyonEldara (7x), CCLS (2x), coolconqueroriii (2x), ddarthez (1x), tmsenseii (12x), expo_dev (4x), masterkni6 (9x), mrbdzz(9x), Lazy_Frank (27x), naphtha42 (10x), 1coghoti (2x), Linisten (4x), quackquackblah (2x), gmmds27 (4x), Club for S22 Leagues continued: Remnant_of_Fishcooking (3x), creyzamo (21x), bequral (32x), windfishballad (6x), BelgradeGambit (7x), Dubslow (4x), kaballeh (4x), picardyThird (1x), masa142857 (45x), Zyronx1 (7x), platyhelminth (6x), vujazzman (16x), TCEC_Spectator (1x), MandelSet (10x), NikolayIT (1x), Blast_Be (1x).

These are the TCEC chatters who have lost 250K for the greater good. Numbers behind their name indicate how often they have done so:
kanchess (11x) , thecoal_baker (2x), RobbyRobbyRob (15x), xtm2212 (2x), coolconqueroriii (2x), PawnMasseur (6x), jjlai1111 (4x), tmsenseii (2x), steinebox18l (6x), cylenty61 (1x), kittenkaboodle (3x), mrbdzz (2x), creyzamo (2x), 1coghoti (1x), windfishballad (4x), Lazy_Frank (4x), naphtha42 (2x), BelgradeGambit (2x), bequral (5x), gmmds27 (2x), Dubslow (1x), expo_dev (1x), masa142857 (5x), platyhelminth (1x), kaballeh (1x), Archstro (3x), TCEC_Spectator (1x), NikolayIT(1x), digretion (2x)

TCEC Cup 10
These are the TCEC chatters who have staked 250 000 trollbits (the maximum) on at least one game during the Cup:
RobbyRobbyRob (8x) Archstro (6x) mrbdzz (x2) kittenkaboodle (2x) MandelSet 1coghoti creyzamo platyhelminth windfishballad AlcyonEldara

These are the TCEC chatters who have lost 250K for the greater good during the Cup. Numbers behind their name indicate how often they have done so:
mrbdzz (x2) RobbyRobbyRob 1coghoti kittenkaboodle Archstro

TCEC Swiss 3
These are the TCEC chatters who have staked 250 000 trollbits (the maximum) on at least one game during the Swiss tournament:
RobbyRobbyRob (x27) Archstro (x3) icantestit (x3) masa142857 (x16) mrbdzz (x5) Metlwing MandelSet (x6) kanchess tcec_fanboy (x2) creyzamo digretion 1coghoti polotovarman (x5) kittenkaboodle (x4) windfishballad jjlai1111 bequral (x2)

These are the TCEC chatters who have lost 250K for the greater good during the Swiss. Numbers behind their name indicate how often they have done so:
RobbyRobbyRob (x3) Archstro icantestit (x2) mrbdzz 1coghoti jjlai1111 masa142857

TCEC FRC 5
These are the TCEC chatters who have staked 250 000 trollbits (the maximum) on at least one game during the FRC tournament:
masa142857 (x17) polotovarman (x5) mrbdzz (x6) kittenkaboodle (x4) RobbyRobbyRob (x22) Archstro (x4) 1coghoti (x2) jjlai1111 (x2) KoHoSto bagatur_superfan Dubslow heyimBigo (x2) tcec_fanboy MandelSet Wolfgang_de_Cauter

These are the TCEC chatters who have lost 250K for the greater good during the FRC.
Archstro RobbyRobbyRob (x3) masa142857 mrbdzz (x2) 1coghoti bagatur_superfan Dubslow

TCEC DFRC 1
These are the TCEC chatters who have staked 250 000 trollbits (the maximum) on at least one game during the DFRC tournament:

RobbyRobbyRob (x12) Archstro (x8) bequral (x13) mrbdzz (x2) 1coghoti (x2) polotovarman (x9) gmmds27 (x2) kaballeh masa142857 (x5) Lazy_Frank (x3) kittenkaboodle (x2) MandelSet (x8) heyimBigo (x2) Vizvezdenec

These are the TCEC chatters who have lost 250K for the greater good during the DFRC.

mrbdzz 1coghoti gmmds27 bequral polotovarman Archstro masa142857 RobbyRobbyRob 

These are the chatters who have achieved the heroic grand slam of losing at least one 250k bet in each of the main events of Season 22:

RobbyRobbyRob Archstro mrbdzz 1coghoti

Bonus & Testing
The 250K Bonus & Testing betting club for Season 22:
thecoal_baker heyimBigo (x5) masterkni6 jjlai1111 (x3) Viren6 (x2) BelgradeGambit mrbdzz (x3) kanchess Lazy_Frank (x3) masa142857 (x5) RobbyRobbyRob (x23) kittenkaboodle (x4) PawnMasseur (x7) ONE_RANDOM_HUMAN icantestit (x2) creyzamo (x2) windfishballad quackquackblah MandelSet (x6) cylently61 bequral
S22 Bonus & Testing heroes:
kanchess masa142857 kittenkaboodle (x2) RobbyRobbyRob (x2) PawnMasseur ONE_RANDOM_HUMAN icantestit (x2) creyzamo MandelSet (x3)

Season 22:
TCEC Leagues Season 23
These are the TCEC chatters who have staked 250 000 trollbits (the maximum) on at least one game during the league season (up until game 7):
RobbyRobbyRob (x45) PawnMasseur (x4) polotovarman (7x) masa142857 (x13) udaosu Windfishballad (x20) creyzamo (x8) mrbdzz (x3) kittenkaboodle (x18) ignaloidas vbcurtis (x2) Vizvezdenec (x3) drdisentangle bequral (x20) dubslow (x9) icantestit (x3) Lazy_Frank (x4) evgeniizh crazy_igel_fan (x6) kanchess (x5) platyhelminth (x4) kaballeh (x2) cylently61 (x2) AlcyonEldara masterkni6 (x2) linisten remnant_of_fishcooking 1coghoti naphtha42 twenty_two_and_a_half Zyronx1 (x2) digretion (x3) Viren6 Archstro

These are the TCEC chatters who have lost 250K for the greater good. Numbers behind their name indicate how often they have done so (up until Sufi game 6):
PawnMasseur polotovarman (x2) windfishballad (x3) creyzamo (x2) vbcurtis RobbyRobbyRob (x4) mrbdzz drdisentangle evgeniizh icantestit (x2) AlcyonEldara kanchess (x2) 1coghoti digretion (x2) crazy_igel_fan kittenkaboodle (x2) masa142857 (x2) Lazy_frank Vizvezdenec bequral

Bonus & Testing
The 250K Bonus & Testing betting club for Season 23: