It does't make any economic sense because every year he waits is another year he is putting off that extremely lucrative second deal. Which by the time that deal rolls around, if you've played well enough, the endorsements start to fly in, big market or not. Delaying that, and even risking losing your chance to ever get it by injuring yourself abroad just for a few extra mil in endorsements doesn't make any sense at all. Besides, there is no guarantee that he winds up in a major market anyway. We've seen players make vague threats before to try and steer themselves toward particular destinations (Dante Exum) that just don't wind up working out. The smart play, and really the only play, should be just to come to the NBA and get his career started. Staying abroad and making decisions based on potential endorsements when you haven't even done anything is such a dumb move that I'm not sure I'd want him on my team if that's the route he takes.