I just don't understand how you can wager 6 million USD a month. Like, the math doesn't work in my head how people can bet enough money to get there, but with a low enough risk to actually gain from it. The 2000USD a day doesn't make up for the losses, I would guess...
You are probably mistaking the fact that those people are using all of their money and they care about how much they win or how much they lose. The reality is that those people who gamble that much money already has a lot more of those and that is why they do not care about gambling that much. I mean sure they must care about it the way you and I would care about how much we gamble with so lets say what is 100 dollars to me, is 3 million to them, its not my whole money but if I lose it all at first bet I would be sad, I would love to gamble with it for a week or two, they would prefer that as well.
It is not about gambling and making money to them, it is more about gambling and having fun for them. If you have lets say 100 million dollars worth of bitcoin, would you care about the 3 million dollar gambling?