This is what buying a game means to me, to be able to play it whenever I feel like it, be it now or in 30 years when the servers are down. With always on DRM I just feel like I payed for a tool with which I get to access the game, but not quite for the game itself. I refuse to buy any server sided game no matter how much I want to play them or how great they are. My two cents.
Any game that is online only I will never pay for, for this reason.
Just because a company might not want to run the servers any more doesn't mean I won't want to play it, and if it's an OLO game, they're basically giving me the finger.