Hmm...
Way back when, I decided to download some of the free things DrivethruRPG was giving away. I had no intentions of actually buying anything from them since, even if the DRM wasn't as restrictive as I believed it, I am still morally opposed.
Anyways, I've recently had to change computers. In copying all my files over, I noticed that I now had those free DRMed PDFs. I figured this was a good chance to put it to the test. And it failed miserably.
They didn't open.
Oh, sure, I was told that if I registered my copy of Reader with the same email address or something like that I'd used before I could open them... but... no. Too much trouble. Not to mention I have no idea what email address I used, since I've got 3 that I use for various purposes and usually make up something random and fake when registering for things.
Oh, and add to all of this the fact that if you lose a PDF you got from DriveThruRPG, you're SOL.
Now, on the other hand, a while back before I'd made the decision to start really considering buying PDFs, I'd made an impulse buy at RPGnow.com (hentacle, the hentai card game, if you care). Now, fast-forward a few months. I've totally forgotten about it. But now I've also started buying things from RPGnow... and one day while looking at my previous purchases, I notice hentacle! And so I click a link and they send me an email to download it! Just like that!
Can you believe them? I mean, how can they possibly be in business? They keep track of what you bought and let you download them any time from any computer? No DRM? Surely RPGNow must be crazy, and on the brink of bankruptcy... Everyone knows honesty and a trusting policy don't make money.