I have to step in to defend Stardock (seeing as how I used to do their PR)... the fact that you have to be registered to download their updates is how they encourage real sales and discourage piracy. Really, I think we're getting to a point where everyone is expected to have internet access -- obviously this isn't always the case, but people without any sort of access on their gaming PC are definitely in the minority now. It's like when people started switching to DVDs from CDs a few years ago -- people who didn't have a DVD drive on their PC just had to deal with it and had to go buy one.
Stardock's position is that they will deliver a stable and good game right out of the box -- you don't need a patch or update to play the game as intended. The updates are usually major improvements to the gameplay, and by requiring people to register to download, they're giving positive reasons to buy the game, rather than forcing crippling DRM measures. It's not a perfect solution, but at least the retail game is solid.