Format C: it just so happens that I've written 3 novels myself, and only been paid for one of them. Are you suggesting that I send you a bill for the other two?
I wasn't necessarily meaning the pay per copy method-- though I wasn't ruling it out either. Anything from a subscription based method through patronage would work too. I was however working on the principle that given that the audience gains the most benefit from a creator's work, they are the ones who should bear the burden of supporting the creator.
Steve you made an interesting point about DRM when you said the key was to get people to accept it and refuse to cooperate with those who break it.
Once that happens you no longer need DRM.
The key is always in the mind of the user.
That's why the best system is one that gives people an incentive to pay which generally means getting rid of DRM. Look at the Spore fiasco for a good view of most people's opinion of DRM.
DRM works best when it gets in the way the least. For everything except vendor lock-in you get more benefits from building a relationship with your customers so they don't want to rip you off than from DRM.