I'd vote for keeping things as they are...
I find is useful that poeple who mindlessly rent their sigs as spam openly demonstrate that they can be bought dirt cheap and have no principles or conscience.
It tells alot about someone who does that, thus I consider it useful info.
When I was advertising for bit777 he only had a few people so he checked everyone thoroughly. I made 298 posts and got paid for all of them.
It's easy to not spam and still post a lot, you just have to have opinions and know stuff to answer people's questions, or participate in discussions. I joined Primedice today and I've made about 35 posts, none of them would qualify as spam imho.
The change is some sort of collective punishment, for a few nutjobs spamming for their lives to get cash.