It really is 50/50 there is a solid case for both sides of this.. personally I believe you should give some and the site should as well.
Good PR for the site would be a public settlement and IMO it should be 50% of the total winnings. You win? They win by making it right.
I proposed it previously, but look like no one responding on that, yahoo62278 or Roobet. That means no one agreed on this proposal.
So finally yahoo62278 won the bet. Due to both side mistake. So I think it would be reasonable to pay at least 50% of wining money pay to yahoo62278. Roobet should learn from it and this would be a lesson for them and other casino as well.
If yahoo62278's account balance is $ 11662, then yahoo62278 should receive $ 11662.
By considering the current situation I can't agree with you. Both side have mistakes and both of them should paid for that.