I see lots of "I'm not getting it because of DRM". Just want to add some thought from my experience.
I've been downloading all of the free products from drivethrurpg, and several of them are products I would have NEVER bought, or even looked at. This has prompted me to look more closely at manufactuers I'm not familiar with. (which is a good thing, I think). I was impressed with Sorcery and Steam (FFG) and some parts of the others I picked up.
I also bought several products, and I will admit that the DRM thing is just killing me. I can't copy and paste the information into my campaign tool like I want, and I may stop buying things from that site altogether, even though there are plenty of products I want electronically.
Anyway, I would suggest at least giving the free stuff a try, and see if you find it limiting as well, but if the style of your gaming does not impede you, you'll be happier for it.