The only thing they have ever done well is host a Q&A board and incubate niche communities.

Then they stopped doing that well.

I understand proprietary licenses and the business models they support, I also understand open source licenses and the business models they support.

If they they published paid binaries and free source code I would support them (morally), or if they published free binaries and free source code and ran a patreon I would support them (morally).

But to fork GPL code and hold the derived source ransom? Not cool.