On https://chess24.com/en they are playing the Magnus Carlsen Invitational tournament. They check with three webcams if the players are playing fair. One of the webcams is placed on the screen.
But I think those top20 players won't cheat. If they do their career is over and they won't earn that much anymore.
Well, never say never. There will always be players that want to beat the system and try to cheat.
Found this article from 2019 where a grandmaster (top50) cheats in a tournament by using his phone in the toilet
https://www.theguardian.com/sport/2019/jul/13/igors-rausis-cheating-phone-tournament-scandal
Therefore, chess still has its potential to be a leading game agad and both gambling and chess platforms will benefit a lot.
Gonna close the thread, I have read a lot of your replies and some really doesn't agree to be listed on a gambling platform. Thanks for the discussion.