FB is what it is because of advertising revenue. Google already had a giant advertising business where jettisoning Google+ made no difference to their bottom line.

Plus was an abysmal failure though. Had it succeeded even somewhat, it would have taken some or much of FB's ad coin, and added it to itself.

EG, their massive failure is why it meant nothing. The potential market was huge.

We've yet to figure out if AI Chatbots are winner-take-all or not. Let alone if AI in general is.