Chrome Web Store Hosted Paid For App Development

Probably the simplest Chrome Paid For App design there is. I have 13 Chrome Apps that are just bookmarks. They are free. They have been very successful. Over 7,000 users have dl'd and used our Apps since June-2011. A Chrome Paid For App that is just a bookmark is needed. Thus only development required is for the pay and oauth (I guess) development. Thus, successful development of this Chrome App is a generic paid for app that's nothing but a bookmark. However the app, and thus url, can only be visited by a paying customer. Feel free to contact to clarify.