Cow Clicker is a somewhat similar example: http://www.wired.com/magazine/2011/12/ff_cowclicker/all/ http://www.wired.com/magazine/2011/12/ff_cowclicker/all/ It

Cow Clicker is a somewhat similar example: http://www.wired.com/magazine/2011/12/ff_cowclicker/all/ http://www.wired.com/magazine/2011/12/ff_cowclicker/all/ It was created as a critique of FarmVille-style Facebook games. You could click a cow every 6 hours for free, or pay money to click more often. And people did! The Cow Clicker creator also implemented a Cube Clicker to beat Molyneux's game to market: http://www.bogost.com/blog/cube_clicker.shtml http://www.bogost.com/blog/cube_clicker.shtml