I think op is not updating this thread and i think they already get his goal about the commenting in his site.. better to stop trying to do this task if op is not updating this few days it means this task was done.
I think this is a good way to promote the website, attract more users and increase traffic... but, obviously, it is important to set some limitations. I myself am thinking I create a website and use similar methods to promote, but there are many aspects that need to be carefully observed.