Person B--let's call them Grobbles--goes "Oh let's talk about that thing"
(So far, so good.)
Then Pigglywinkle suddenly realizes that:
-What they think might be controversial
-Saying what they think could cost them money because they're professionally employed in a field where their audience reads their opinions...
…so they bug off with some vague, smug send-off --"I see the time to mute the post has come upon us," for example.
Now, while distasteful, that could happen to any poor Pigglywinkle who has to feed his or her family. And it could occasionally accidentally happen to a Pigglywinkle who just gets bored realizing they're talking to internet psychopaths. No problem.
Because, essentially, if Pigglywinkle does this then Pigglywinkle is using the idea of debate as advertisement for themself. While avoiding the debate. It's hypocritical.
Easiest example I can think of is when Fred Hicks attacked the game Kingdom Death for being sexist, then went back and erased his own post on it once he realized how many people were calling him on it and pointing out he was wrong. He replaced it with something snarky like "Oh sorry I had an opinion" instead of, y'know, having the debate he started.
If you are worried your real opinion will get you in too much trouble to pay the rent: just say "I need to pay the rent, I must be quiet" and relax. People will understand. Let other people do the talking if you are afraid. Don't start debates, don't pretend you like them or care about them.
And no, I'm not thinking of any one particular Pigglywinkle today (I can name at least 5 off the top of my head in RPGs). It's just a stupid thing I was reminded of and it'd be nice if there was less of it. Don't Pigglywinkle. Nothing good can come of Pigglywinkling.