I don't understand what "slightly condescending virtue signalling" is and how it "allows you to pass information freely" and what the fear is regarding "being v

I don't understand what "slightly condescending virtue signalling" is and how it "allows you to pass information freely" and what the fear is regarding "being viewed as someone who is dead serious about that kind of charts" or what is wrong with someone who "frequents PUA-forums" I'm so far removed from this stuff generally I didn't really understand anything in that sentence (lol)