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.
D. Liben-Nowell, and J. Kleinberg. Proceedings of the twelfth international conference on Information and knowledge management - CIKM \textquotesingle03, ACM Press, (2003)
C. Scholz, M. Atzmueller, M. Kibanov, and G. Stumme. Proceedings of the 2013 IEEE/ACM International Conference on Advances in Social Networks Analysis and Mining (ASONAM 2013), page 356--363. Niagara, Ontario, Canada, (2013)