That's about as likely as Nintendo or Sony indiscriminately rendering ads on top of the viewport while a game is running on their consoles. It's never gonna happen.
I disagree. Nintendo and Sony don't earn the majority of their profits by selling ads. Facebook does. Nintendo and Sony customer base is people buying games while FB's customer base is advertisers. At the end of the day, each company will do what it must to retain/acquire customers.
Nintendo I agree with whole-heartedly. Sony, not so much. They sell consoles at a loss [0], and make up the difference with licensing and percentage-of-game sales from publishers.
Meaning I am Nintendo's customer, Epic Games (I... think(?) they make PS5 games) is Sony's customer, and assorted advertisers are FaceBook's.
Edit: fixing typos