A poetry site that I used to frequent (Allpoetry) would let the people who donated "gift" their credits as a prize for user-sponsored poetry contests and commissions. I thought that it might be something ya'll would be interested in, at least in the future. The user-sponsored contests, projects, commissions, etc, really boosted community activity, and it was a way to spread around credits that could be used for special features while still donating to the site. It was a pretty cool system that encouraged a lot of creativity, creation, and experimentation - and it seems like something that the community here would be interested in.
Just food for thought.