VST 3 SDK Licensing FAQ

Hello,
I need some wisdom here regarding the Open Source licensing option.

Recently I have been in touch with the Fedora Linux developer community, and an issue was raised about redistribution.

It was brought to my attention that the Usage Guidelines adds some additional requirements, that applies to either license option.

I was directed to this Discussion regarding apparent problems.
According to the discussion, the added restrictions of SDK make the software non-free rather than GPLv3, and not adequate for distribution standards.

Can one maybe confirm if the assumptions here are correct?
Thank you.