I gained $85 by using this service. It only works on iOS devices though. All I do is download there sponsor apps in order to gain spins and then play the slots like game to earn credits. In two weeks I gained $85. It's very simple and fun.
If you have an iOS device (iphone,ipad,ipod) you should atleast check it out:
http://tinyurl.com/getfreeappsnow
Gain 5 free spins using that link.