A number of games I have played have game voting sites. If you vote once a day the game gives you a little "goodie" for each day that you do it so that it offers incentive. It's completely optional though and it's a little link or icon that they can click to vote and "collect" their goodies if they want them.
Possibly, this may help with Upjers' publicity and pull in
more players and increase the amount of money[/u] you guys make. 