Legally free sounds like free license to me. But I get why you are stressing the legally part. There are actually quite a lot of artists on bandcamp who have nyp for a lot or all of their library. Would you really want to have individual posts for each album? That could become quite spammy. Maybe one post per genre with comments for listing albums is a good idea.
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Yeah, the whole thing with that MusicBrainz post is that the license doesn't seem to matter. I'll look at changing the title if it confuses people. If anything, I need to stress that linking pirated content is against the rules and I think I did alright there.
As for the spam issue, I'm not overly bothered if people want to post multiple albums if it's all from different artists, but I know if it's one particular artist being posted that can be seen as spammy and/or self-promoting. I think more people are likely to post releases outright rather than group them into genres (especially when some artists mix genres up), judging by other music communities here and on the fediverse, and I don't want to punish people for being overly enthusiastic.
In any case, I'll see where the wind goes with this and make changes if necessary.
EDIT: changed the title to just "Free/Name Your Price Music". I think that encapsulates it fine alongside the "no piracy" rule.