I understand what are u trying to say about the private leagues, but could be posible to find a way for both players to be ok, the sponsors and the not sponsors, but, because the sponsor pay, it should be a little advantage for them.
About the votations, i think that it's quite correct and just process votation for the best player, and yes, i think that having a good player, dosn't matter a all-star, winner of concurse of ''triples'' ( 3 points score ) or the most score player of the league, must win a money reward or level up, because the reality, when u win a reward, u start to trust more on yourself and play better.
good luck to everyone ^^