Over the years there have been several bugs questioning the fact why "Flight of the Amazon queen" and "Beneath a Steel Sky" were accepted into the main section of the Debian archive by FTP masters. First of all, both FOTAQ and BASS are fully DFSG compliant. All the rights mandated by the DFSG are satisfied by their BSD-like license. The contrib section of the archive is meant for code which requires out of archive tools to compile program source, e.g. a library not packaged or a non-free compiler. Both FOTAQ and BASS do not need to be compiled, they are a aggregation of media which is interpreted by free software in the archive (scummvm). If they were licensed under the GPL it would fail the "preferred form of modification" requirement, but it's BSD-like license grants you all the necessary rights to modify, use and distribute. While there likely was, once upon a time, a custom set of tools to create this game data, those tools do not exist any more. The original creators of the game is in the same situation as Debian's users when it comes to modifications. Also, the reason for requiring the "preferred form for modification" is to not put the creator of the software/data in a "monopoly" situation. This isn't the case here.