Yeah, as most of the people have stated, it is simply a sponsored , and he used his own money to participate. I am confident that half or a significant portion of the money will be returned to him as a talent fee, even though he won, the event still generates a great deal of publicity. This is a really good strategy right now because it works for everyone and attracts users because they are using big celebrities. In regards to that financial manager, he does indeed have one, and they do, in a sense, control the money he has.
I guess it is safe to say that whether Drake did this in collaboration with stake to gain good publicity, or he did gamble to multiply what he has, or even just because he wants to do something new from his routine, it boils down to him doing it for business and for his gains. And true enough, he did really gain a lot from doing that, right?