Ok, here's how Google works:
The more websites in Google's directory link to a page with the search term, the higher the page is on the results, as soon as a page is linked to by a page in the Google directory it gets added to the Google directory
The PDF pulling has causes ALOT of message boards to flood with posts on the issue, ENWorld's message board system for example causes an overage of links, with each post producing 2 links to the thread in question exponentially increasing it's ranking
Combine this with the tight-lipping on RPG-pirating sites due to the recent lawsuits and you create a vaccum effect where the legitimate sites are disporportionately represented in Google's directory
So assuming that WotC/Hasbro bought "off" Google just by the results pages changing is a very hasty suppossition and ultimately insulting to Google's business ethics
On another note, can we change the thread title to "Hasbro bought off Google?" because I opened the thread thinking it was discussing a real business transaction, I mean anything's possible, Oracle bought Sun recently too and that caught alot of people off guard