My opinion on private bots is that they are either highly funded or highly technical. The game prize money is not worth that investment, even if it has nothing to do with game skills. I don't understand the spirit of obsession with winning at this game, but I have to admit that passion doesn't annoy me. And since there are so few users, it's not impossible to countermeasure.
Is there any evidence that private bots are shared across IG? I have read @jaki01 's posts and believe he is not using such.
If there is proof, I believe it is evil.
I must say that xbot is destroying the game by deploying high performance AI as a cheap or free service.
There is nothing more disgusting to watch than boring players with no game skills, passion, money, programming skills or anything else dominating the top rankings.