Saturated much? See:

http://onlycoin.com

http://plastc.com

http://walla.by

http://swypcard.com

http://startoscard.com

https://www.imaginecurve.com

Slightly disappointing there is no Android app right now. Very disappointing that there is no info on their rewards scheme. Hard to see how it is worth paying £40 for double rewards when you don't know what the rewards are in the first place!