Each PayPerPost Opportunity post must be separated by at least one non-sponsored, original content, post. 'Sponsored' posts apply to both PayPerPost Direct and Marketplace Opportunities, as well as other sponsored posts from competitive services.
I didn't know when it takes effect. I just found out about it today when 2 mommies informed me that their post got rejected and they are told not to resubmit.
I feel that is it a lil bit unfair if the post is auto approved. After one month of advertising for the advertisers, when it comes to payment time, we are told that it is rejected due to the interim post. Like that the advertisers got free backlinks already.
Well, I quickly went to check my blogs. Thank God I played safe all this while, making sure my interim post for PPP is non paid post. :) So I am safe. I hope. :P