Added bonus is that they are not asking you for your mother's maiden name, it is just generic stuff that doesn't matter. plus, if you are planning on winning 250k, you could literally fly to Vegas with that kind of money and gamble it legit and have fun meanwhile, or you could go to Cyprus or Monaco, or Macau, wherever is closest to you.
All I am saying is that, people who are looking for big payouts, likes of which I would never imagine, they couldn't care any less about KYC. If I ever get lucky enough that I would get a ton of money like that from a small bet I make, then I would be throwing my ID at the screen let alone doubt if I should do it or not.
This is why many still play on Roobet because it seems more effective for them and giving out your basic information is fine especially if you got a big win and many are willing to fill out the KYC form. Even on Vegas they will ask you for your personal information especially if you are going for a membership with them, they even require your passport so I see no difference with this one.