I'm no guru, when it comes to licenses. But I don't really see a problem. As
long as the non-free host can somehow manage to legally include the SDK to
load the modules, then it's no problem. It's on the user's side of things, to
load a plugin or not load it.
I'd think the problem could be to include modules with the non-free
software. But if the user downloads them herself, that should be OK. The
license of those plugins should be clear.
Music was my first love and it will be my last (John Miles)
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