The cards are for your stats/profile on bungie.net it has lore and stuff.
The emblems are for your name tag/profile and the shaders are basically armore tints
Play touchgrind skate 2 or true skate and you will see that you can have awesome precision skate game on mobile.
and Wombat should get a new Macbook or Mac Mini
Cheers for brightening my sleepy morning.
The PC version of Need for Speed is well...
Let me leave this video here by TotalBiscuit
http://www.youtube.com/watch?v=eDA37BmvNwM
Stop wasting time on collecting points on those apps. Just use AppZapp and track the games you want and get them when they are free.
ALL apps go free/sale at some point.