Excuse me but I'm confused about wanted gms rule 4 and 6
I could be wrong, but my interpretation is that those rules refer to specific games on RPoL. Not just the setting.
So, say, if you wanted to play Scarlet Heroes and asked 'Hey, is there a GM that wants to run this?' that would be okay. But if you wanted to play Mr. Magoo's Scarlet Heroes game titled 'HEROES AND YOU' (that's already running on the site), it wouldn't be kosher to put up an ad saying 'Hey, Mr. Magoo, I want to play in HEROES AND YOU' - Can I play?'