I've been a lurker around bitcoin talk for a while and also an avid player of Roobet a few months now, I'm down several hundred dollars there but your baseless claims are too hilarious not to comment to so I've had to dig out my ancient account, don't get me wrong from what I've seen they've still got a long road ahead from them and they are still relatively new but your claims are hysterical.

A casino doesn't need to prove the legitimacy of any bets to someone like you, and as this was a live casino game sourced by a third party, you don't seem to know how they work, typically the provider will charge a percentage on each bet or the profit the site makes overall from their services, you're trying to say that Roobet simply sits their all day placing bets on their games while racking up fees with their providers or made the win out of thin air to mislead users? I'm part of a roobet discord with some friends in the community and this was shared there https://prnt.sc/s8v7dq - seems like it must be fake right?

no, I didn't think so. I think any casino in the right mind would want to capitalise on such a win, and you're really firing them down for that just because you seem to have a grudge against them? 

You also question the capability of Roobet paying out a bet of this size, casinos like this typically are a multi-million dollar business & have a huge amount of investment behind them, they'll probably make at least $250k back in a few days, if not double that, they work with a lot of influencers which probably have brand deals consisting of tens of thousands, I couldn't see a business of this size sacrificing their integrity for that, I really can't comprehend your logic, it's beyond me.