regarding copyprotections... some of the games that were made for the Amiga is actually quite impossible to get hold of in the original box, complete with a manual and codewheel or whatever being used as copyprotection. So the games that are non-aquirable and that is definitly not being sold anywhere but available as ADF is actually quite a good idea, as long as someone don't abuse it. (back2roots is a good example, they have contacted the software houses that made the game and asked for permission to have the games on their site.)
Now personally I buy all the games I want to my Amiga through various websites, but sometimes it is impossible to aquire some rare, really old game, as I mentioned before. So one should not be too quick to judge the cracked versions... UNLESS some idiot tries to sell these games and make a profit for himself!