Well, let's see.

Blender.io = advertised here + had an ANN + active user on the forum
Sinbad.io = advertised here + had an ANN + active user on the forum
ChipMixer = advertised here + had an ANN + active user on the forum
BestMixer = advertised here + had an ANN + active user on the forum

All shutdown by agencies.

eXch also shutting down here because of a potential operation and they were advertised here, had an ANN, were super active, and even donated money to users here.

What happened to the forum and its users? Exactly, nothing.