I treat anything that is DRM-encumbered as a rental, and make buying decisions accordingly. It is not something I own, and I do not expect to be able to use it beyond a certain time horizon (a year or two).
Yep. For any game with severely limiting DRM, the maximum price I'm willing to pay is $5, which I deem fair for an indeterminate rental with no guarantees.
I think Assassin's Creed 2 has been down to $6 a couple times on Steam sales, but I'm not quite willing to put down even one extra dollar. Oh well, their loss. Meanwhile, I've spent a couple hundred dollars on Kickstarter games in the recent past, all of which promised a DRM free option.
Same goes for DRM-protected books or music.