For the moment, the ones I was thinking about are still all official.
- You can only buy at this or that concert: …場限定盤
- Only for fanclub members (some during concerts, some by mail order): SLAVE, TeamAyu
And I’m not sure I would put them as promotional (for me promotional is mostly given out stuff, not sold), and their official homepages usually mention these editions like this or that (they are all officially listed for these artists, for instance).