It does seem to be lucky to be using ethereum on there. As you can see from the screen below the one who has been winning alot on the site had been using this for their bets.
They were doing these type of bets several times as they won three consecutive 24 hours races in a row!.
From around 150 dollars each, that bet is literally 4.5k dollars to bet, and when he won it was 40.5k profit as well.
I don't know how deep his pocket is but honestly it is obvious that this dude has absolutely no fear at all and is quite bored at staying at home as a rich person so he wanted to just have some fun.
I am pretty sure if you are gambling this high you must be a rich person, if you are poor first of all you will not have 4.5k to gamble, no poor person has that kind of money, but lets assume you do not consider yourself rich, just good enough, even in that case you can't keep doing this forever, so you will run out of money, which means you HAVE TO be rich to do this.
Secondly you have to be equally brave and stupid as well, because after a while that kind of money becomes so much to gamble that whatever we end up saying he might return with "its my money I can do whatever I want with it" so I am not going to judge but oh come on! amount seriously.