Well, I wouldn't say there's any deciding taking place. Maybe more some general rules.
- tracked
- original format
- coming from Amiga is a plus but not mandatory, obviously, at least for known Amiga musicians
BP (soundmonitor) is there because there are quite a few of them and they are widely used in trainer/crack intro, etc. They also happen to have a title which makes the sorting easier. We have 85 of them presently.
GMC (game music creator) is also there for being a more or less regularly seen format used in games. We have 66 of them.
My goal, here (as it's actually me adding those formats), is to add some more formats. However, those like FC13/FC14 and the like have simply no title or easy naming that can be done.
In any event, there's no real line drawn. If we have some material to add Tomorrow, we'll add it. As long as it is somehow possible to identify each music (and their authors) so as to prevent useless uploads because nobody would understand the file was there but named differently. It does happen already today with countless converted packed protracker, so, I'm kind of sure what to expect

. Unless, it's as clean a naming/sorting process as possible.
Ideas are welcome

Oh, and a note about the "exotic" format JAM (jamcracker) of which I've added 3 files. It so happens the "pro" version of Jamcracker stores a title. Those are thus sort of compatible to fit in. Not the old material, however. At least for now.
Cheers
Sylvain