I see this could be a tool for smaller authors to attract more people, but it could also be a point of complain for minnows to whales, for setting their author curation too high.

For example, if people see a whale like Sweetsssj making hundres on a post, and they would see that she sets her author rewards to 75%,  then people would complain about it. And to keep her rep up she would need to automatically lower her author rewards.

I think this effect would apply to most whales, which leads te beginning authors to have to set low author rewards. I beginning author already doesn't have much incentive to write, other than that he or she would receive considerable rewards for it. The starting author would need to sacrafice early rewards to gain more for later. 

I think this takes the whole monetary incentive away for new users.