Quick Update: After a year of internal debate and listening to feedback, we have decided not to "police" the Internet in regards to our service. So we have decided not to bother trying to block malicious users from misusing our service, as it is an uphill battle and angered many legitimate users anyway.
Since we are no longer going to fight the malicious use battle, we have less reason to enforce PVP and have decided, as of today, to no longer enforce PVP for Free users. It is now optional for all users. Due to abuse, we were also forced to do away with the free "inside pages" and "unlimited bandwidth" on PVP. So there is really no reason to use it any longer.
The only caveat is that the other issue that pushed us to PVP was abuses of our system by webmasters signing up for multiple accounts. So the new "Free" (non PVP) account will have a reduced bandwidth, going from 5Gb down to 1Gb. That should be enough for most of the free users, based on our metrics, and an upgrade to Basic or PLUS will bump back up to the 5Gb.