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.
Drake won because he decided not to quit gambling after the multiple losses that he has recorded in the past that run into hundreds of millions of dollars and yeah winning this $40 million as mentioned in the topic is quite a good one although you did not include what odds the game is bet on and what amount he used to stake the bet to win such an amount so as for us to determine the level of profits he made from that bet, but of a truth stake have no contributions to how and what Drake bet on and how he handles their outcome.