Link to another thread discussing IDN some time ago. Accusations of super users etc. I Personally knowing some of the people who have made these claims, I would take them somewhat seriously.
I played there in 2016-2017 or so, I'm 99.9% there were super users. This is the first and only time in 9 years of playing mid/highstakes, I ended up quitting that site after losing a decent ammount playing nl2k. Also in my group of friends no one was really winning despite your typical table would be like 2-3 regs maximum and 5-6 whales.