the adf files they have on their site are all cracked versions. They will happily accept adf files of original games (I have supplied them with Wings, It Came from the Desert and Rocket Ranger). The reason they have poor archives is that the original Cinemaware went bust many years ago, a few years ago some of the original people from Cinemaware revived the company and they have started from scratch regarding archives.
I did tell them about e-bay, but since they're also happy with getting adf images I figured that the Amiga community wouldn't mind helping along.... hope I am not proven wrong!!!