I came across this awsome site which makes the voting process automatic or favs for your social bookmarking sites, and it won't cost you a red cent!
Automatically get as many Diggs or votes, whatever the particular bookmarking site calls it, as you want.
the folks over at eBizMBA have put together a list of the top 20 social bookmarking sites. They based their results on data on a combination of Compete.com and Quantcast data
Here are the top 20 largest social bookmarking sites ranked by a combination of Compete and Quantcast data. For each site, we show unique U.S. monthly visitor data as well as respective rank.
Save bookmarks. Tag them to easily access them from anywhere.
Vote bookmarks, comment and discuss. Make new friends and share your favorites.
Discover latest new sites. Let us stay current and informed.
B. Krause, R. Jäschke, A. Hotho, und G. Stumme. HT '08: Proceedings of the Nineteenth ACM Conference on Hypertext and Hypermedia, Seite 157-166. New York, NY, USA, ACM, (2008)