This feature could be integrated in the UI in a very user friendly way. For example before submiting their posts, users could be presented with an option to boost their post. A 80% boost means 80% goes to curators, a 50% boost means 50% goes to curators. When you increase rewards for curators you are effectively boosting your post.
Yes, and the upvoter would not know either way. I love the randomness of this idea.
The idea is that curators will know beforehand what percentage a post will give them and they will then vote accordingly.
Say for example a new talented author want to build up his reputation and is more interested in the attention the post gets than the actual rewards. This author can chose to give 100% of the rewards to curators which will draw a lot of voters to it ( only if they are aware that the post will give them 100% of course)
So then votes become attracted to money and not necessarily good content. Curation rewards should be secondary to choosing quality content IMO.