I can point to games that I did not buy specifically because they had horrible DRM. Most notably Crisis 2 and Spore which I had reordered and then canceled after I read how bad the DRM was. Granted the fact they both got many poor reviews also helped that decision. But, DRM costs company's significant amounts of money to deploy and also costs them sales.
Now done well or even just unobtrusively DRM clearly can work, most notably with consoles, phones, and Steam. My point is simply buying 48, hours which is considered a success in many DRM circles, does not mean you actually benefit monetarily you need to look beyond time to crack in expectations that it will be cracked and how enticing you can make the guided cage. It's possible to make always on DRM orders of magnitude harder to crack but doing so will cost you many upfront sales some of whom will wait for that first crack unless being online is already inherent to game play.