[@Raddum] I joined an rp that I glanced at and the GM mentioned me in a post shortly after. I don't see a problem with that as the GM is hoping to get a reasonable turnout and wants to see their project do well. It also shows that the GM feels passionate about their RP, and for some that's all their asking for. (Been in several role plays where the GMs have ditched it) 

Besides... If you don't wanna join then ignore the mention. No one is forcing you to join, no one is forcing you to respond, and maybe you may happen to find it interesting and lose the page before subscribing. 

Just pointing out that there's another side of the coin to the "no junk mail" view.