This is a prime example of why we need copyright reform. Here is a guy who, by his own admission, (co)created a cultural landmark; something many people know, love or at least recognize. In a prime example of bait-and-switch scam, after it has gotten successful, he's now trying to lock it away behind a paywall, extorting people just to keep using what they already paid for. Maybe he has the law on his side (after all, it's only to be expected that capitalism would serve only the interests of rent-seeking owners), but proprietary music is eating away the very foundations of our culture. This guy should be boycotted and we should organize a movement of musicians who make works available for Free - not just free as in beer, but also (and more importantly) Free as in speech.
(/s , if that wasn't obvious...)