I believe it meets the definition of virtue signaling to express a position you don’t do anything to advocate - which is the vast majority of opinions expressed on the Internet. It can be a sincerely held belief but if you’re not taking action around it I don’t see any difference from the corporate example you gave.
What’s inherently wrong with virtue signaling though? I’m signaling virtues of thoughtfulness and careful, reasoned, intellectual debate. What virtues do you think you’re signaling about yourself?
I suspect that the people that dislike supporting Google probably don’t support Google. I imagine that the people who dislike supporting generative AI do not support or use it? Why are you assuming they are hypocrites?