Sportsbet didn’t pay anyone. It’s not on the blockchain.
You are kinda right though the player did win the huge amount through Sportsbet.io and didn't have any issues with receiving his winnings which is why they definitely deserve partial credit in this case.
Their director also invited him to their HQ to treat him exclusively which is a good gesture from their side.
Agree with you. The player won through Sportsbet and it’s a great gesture on Sportsbet’s part to celebrate with the player.