[giancarlostoro]

This is likely not the problem they're trying to solve. This is more of a solution for selling files / access to files, and they provide (assuming) a proxy to that file so people don't just paste the link to the file everywhere on the internet. What you're looking for is to make your blog accessible only by certain registered users, and sell access for accounts. Unless you sell PDF files of the things you blog, then you could use this service that way.