D2D is fine, its just simple website with a simple download manager and the publishers put the DRM they want on it.
D2D is fairly good service in my humble opinion.
GOG is the best, but D2D has gotten better.
Could you please tell me why they are not preferable to you?
D2D is great... as long as you don't ever need to re-download a game more than a year after you bought it. I bought one game from them via their partnership with my ISP, and both my ISP and D2D claim that the other one is responsible for the game I purchased. After I did an OS rebuild, I needed to re-download that one game (never mind that I was an idiot for not making a backup) and neither one of them would help me. After several heated e-mails D2D decided to offer me a token $5 credit towards my next purchase, but I still don't have the game that I already spent $20 on.
Pardon me for saying this, but what the fuck? D2D had a partnership with your ISP?!?
What kind of promotion was that, was it with Comcast?
At any rate I bought Oblivion from D2D at launch date, I download it almost every year, no problem and sure I ran out of activations, but it only took 1 email to remove the activation limit permanently.