I think Valve has a pretty good opinion on how to fight piracy and f2p is similar in that regard. It's almost always matter of quality of service, not pricing. We can all agree that p2p when done right is good enough MMO model, but the issue is almost nobody is doing it right. I do expect that to change in the future however and I can imagine very easy steps for TOR to become atractive p2p title from my perspective.