If you are familiar with this American artiste you would know that he is a big time gambler or you can just say he is addicted. People are amazed he won such an amount of money in a single day but I'm not because there's a high chance that he has lost up to that amount or perhaps more than that if you calculate his losses combined. This win might actually be a way to lure people into gambling, it's very possible that the casino allowed it to happen for promotion purposes. It could be a way of advertising their casino what do you think about that? It's just a random thought, It's also very possible that he just got lucky.
You are forgetting that drake has also lost countless times and this information that you posted isn't something I've seen anywhere online, do you mind posting the link so we can know it's legit. Even though he's an ambassador for stake that doesn't mean that he won based on promotion or advertisment purposes, he has probably lost more than that amount of money he won, stake is known for their transparency and integrity, there's no scam zone, there are no adverts, he's just a gambler that has a lot of money to spend, not everyone has that kind of money.