When this repository was setup,
I thought about asking you to include a column that specified whether or not a plugin was open source, but had immediately decided that it wouldn't be a fair request.
It's not a bad idea, but it's not something I think important or relevant enough to add to this particular table.
It's already a challenge to present this kind of information nice and compact in a forum post, and I'm not really looking to add complications.
Also because (even though I have shared the login info for 'MusicBorg' with several other forum members) until now it's only me that is maintaining this table.
(not blaming others about that at all, since the BBCode stuff involved isn't very easy or much fun to edit at all)
As you suggested, perhaps it would be easier to implement something for it on MusicBee's plugin website page,
That may be have some sort of database like foundation that could be used for it.
But I have no idea (nor an opinion) on that.
I'm curious: What is the reason for you thinking about this, and what would be the benefit of having something like this?