I just did a test usergroup. I set it's limit to one. I posted a test ad for three days. After that I went to attempt to post another ad. I got the "you have exceeded your maximum alllowed limi of 1 ads."
It didn't even give an option to pay for an ad. Why would anyone put a limit on the number of ads that can ever be posted. I don't understand how the photopost developers could figure that was what was wanted.
If they really think that is what the majority wanted, there are enough people out here that want it limited as I described above. Perhaps they can give us a choice as how to limit the ads.