Yes, that problem is I trying to know how to solve. This site really solve a problem (so customer pays for it), but in my opinion, the natural of this type of

Yes, that problem is I trying to know how to solve. This site really solve a problem (so customer pays for it), but in my opinion, the natural of this type of service is low user retenion. How to reach as much as possible customers is critical. Some types of services will make people say: "that's good service, maybe I will use it someday", then put it into bookmarks only. The real customer even don't know that service (after ran out of Adwords credits). I think http://www.korekt.me/ http://www.korekt.me/ is like that.