Others may have covered this but I think you should have the landing page be the site itself, that will be an good advertisement rather than a product sell page. Also, the tags are interesting, but I find them distracting and would rather a single 'upvote' count with specific tags. The navigation needs some improvements, the submit button is somewhat hidden near the top and should be made more prominent (grey on darker grey is hard to see). Other than that, I have been interested in a similar payment model for sometime.