PPP V/s Social spark

I think ppp is not getting too much business but social spark is getting Good business.Whenever i sign in PPP i could not find opps but when i see social spark's penal it shows good no. of advertisers over there.Here i could grab one opp daily.One more thing about social spark that social spark does not have any obligation regarding Google page rank.It's all about the quality of your blog n your blog content.