jungletoad: I don't understand the people here that say they won't pay to have a game be DRM-free, but they don't buy games with DRM. That means you effectively are paying for a game to be DRM-free. I know it psychologically feels like you are paying for the game, but if you would not have paid for the same game with DRM, then you are paying fo have it not be present in the DRM-free version you purchase.
Likewise, with people that say that they will not pay for a game with DRM unless it goes on a good sale. That drop in price is the amount you are willing to pay to have the game be DRM-free (assuming you were going to buy the game at full price until you found out about its DRM).
It's not the same;
Let's say GOG released Anno 1233 for €60, whilst the same game was available at Steam for €50 though with a "three activations limit". I still wouldn't buy it on GOG, as I would see the DRM as exploitive towards me as a paying customer.
As for paying for a game with DRM if it's heavily discounted; I see it as renting a game. As they don't let me own it (i.e. play it whenever I want, on whichever computer I want, and in ten years time as well), I don't accept to pay a price that equals buying an alternative game.
What you could say is that if Anno 1233 was released without DRM (or light DRM, like Steam), I would contemplate buying it for something close to full price.