Yes I have seen the thread. Catching a player using just the winrate is hard. 9k hands is peanuts and some of the assumptions in that thread (like a 53% VPIP player must have 0bb/100 winrate) are slightly far fetched.

I know for a fact that GG has a GTO detection algorithm. If you play too close to GTO/optimal strategy they investigate. Lot of RTA folks got caught this way.

Jason Koon and Fedor Holz are part of the team which manually reviews statistical anomalies. Its stupid to think they dont know about the data side of Poker. Moreover, a ton of Poker players end up becoming traders and data scientists. There is a lot of skill overlap.

I agree that some of the stuff is PR nonsense but to dismiss their entire anti fraud operation is just stupid. They are literally the best in the world at this.