wow, you have flattr.com right there: "Economics Free CompensateArtists Voluntary Adjustable Background Tip Jar You say, "$20.00/month" on tips. You decide

wow, you have flattr.com right there: "Economics Free CompensateArtists Voluntary Adjustable Background Tip Jar You say, "$20.00/month" on tips. You decide how much you want to tip on a given month. Each participating site that you go to gets a share of that tip jar, in direct proportion to the time you spend at that page. You can also make an extra to a particular site if you want, with a built in tip button of some sort. Before payments go out at the end of the month, you can adjust them as you like. "