I thought MFA (Made For AdSense) referred to the page where the person landed, not how the person arrived on the page.
If I have a domain name that I think people will type in directly and I put AdSense ads and little else on the destination page, that's a page Made For AdSense IMO.
If I have a domain name and associate it with a page where I've put AdSense ads and little else and buy traffic from AdWords or other sources to send to that page, that's still a page that has been Made For AdSense.
Considering that many registrars now put PPC ads on a parked page when someone registers a domain and doesn't do anything with it, that number doesn't surprise me.
I wonder what percentage of parked domains have PPC ads?
I understand the difference, but it doesn't make any difference to the point I'm making. And that point is there are a LOT of pages where a person can end up and see PPC ads and little else, regardless of how the person arrived on the page.
What are the future implications of that? I have no idea.