Below is a list of websites like GreyStripe / services like / similar to GreyStripe :
Greystripe is the world’s leading independent mobile advertising network. Greystripe delivers the highest engagement for advertisers, the maximum revenue for publishers and app developers, and the best ad experience for users across all major mobile platforms, reaching tens of millions of mobile users. Greystripe’s proprietary advertising platform currently serves ads into more than 2,500 application titles and mobile websites, supporting over 1,400 handset models globally..