However, because of this, it was quite normal for games developers to create their own disk formats and apply copy protection, and indeed most full-price commerical Amiga games had some form of custom disk format and/or copy protection on them.
However, because programmers did not have not use the operating system routines, it was quite normal for games developers to create their own disk formats and also apply many different sorts of copy protection. As it was, most full-price commerical Amiga games had some form of custom disk format and/or copy protection on them.