I don't think that this is as a result of greed, basketball players are well paid and it's useless for them to chase money through gambling but some of them like this guy in particular is dealing with gambling addiction...this is the reason why he was ready to put his career on the line, he knew that what he was doing was am offense and it's prohibited but he still went ahead to do it, I think he was trying to show people how good he is
Agreed greed is not the only reason, you will find a blurred line between opportunity and persuasion which will lead you toward addiction. FBI is inspecting Malik Beasley's abnormal prop-betting patterns, such as excessive betting on under 2.5 rebounds when he snatches six, which put forward more than a momentary gap. The NBA's strict rules are in place for a reason. Jonte Porter obtained a lifetime ban for much the same way of behaving. Even if some players could afford to gamble, the stakes are massive, both for their integrity & for their careers.