The consensus on that list is that License Zero violates certain tenets of the Open Source principles, and as such software released under a License Zero license is not open source software. By extension, this means that getting to work full time on License Zero software means that you’re not working full time on open source software.
> FreeDB avoids this problem by supporting multiple entries for any given disc.
FWIW, something somewhat similar to this will Soon™ be part of MusicBrainz too: https://tickets.metabrainz.org/browse/MBS-4501 – you might want to read through there and maybe even put your own thoughts about what it can be used for in a comment on that ticket.
> MB […] used to have rules specifically banning anything except Camel Cased English Literary Title style
Just out of curiosity: When was this? I’ve been involved with MusicBrainz since summer of 2006 (ie., for over 10 years) and this hasn’t been the case for as long as I’ve been around.
… And I think this has exactly been @bunderbunder's argument from the start? That the "definition" put forth by threeseed is naïve and could at best be usable on an amateur level, but as soon as you start having money involved, you really want a more in-depth/verbose/specific definition (like the one the OSI provides), rather than simply being "I can read (and thus modify) the source."