A 2-cent suggestion although it doesn’t work for this Vote-Off.
Allow registered site members a few votes for each Vote-Off. It wouldn’t get you money directly but would probably encourage people just checking out the site from Twitter, etc., to register on the site and hopefully participate. This would eventually (hopefully) lead to a lot more interaction and more Supporters.
I know you need money to keep the site going, but trying to get money out someone new to the site to be able to vote is a turn off. The availability of sites for exposure has certainly increased over the years and its tough to get people to pay for what they can get free elsewhere. I don’t mean that derogatory to this site. I like it and that’s why I participate. 🙂