I wouldn’t say that max win is something "normal", which happens often! Max wins are rare, even on slots with max wins lower than x5k! And hitting max wins two times on the same slot in two different casinos is something to think about! I am not saying that he is a cheater, I am just saying it's a bit fishy! I am playing slots for years, normal play and bonus buys, and I had some crazy nice wins, but I never hit a max win on any slot! Again, I am not saying that max wins are something impossible, I am just saying it takes a lot of luck to hit one!
And one other thing, Gamdom is not the only one in this story, provider has it's roll too, maybe even bigger one than Gamdom!
Depends on the amount of the max win if you ask me. I mean if we are talking about a max win that would be low, because a place is new, then I would understand it but if the max win is like 10+ million dollars and it happens, then I would argue that it is weird as well.
However we have to realize that there are some rich people in the world, and plenty of rich in the crypto world as well and they could max anytime they want, and they could end up winning as well. If he is cheating, then I am sure this is gamdom's responsibility and they will check and find the reason and the method he cheated, if he is not cheating then he will be able to withdraw his money.