That sounds like the renaissance we've all been waiting for. Every would-be entrepreneur's wet dream is a $20/month subscription for Facebook.
Which is bonkers to me personally considering how little I use it.
It is an interesting thought experiment, though, to consider what facebook would look like if its revenue was derived from convincing users that it was worth a monthly subscription.
I compare that with Twitter at the time had two thousand employees. It makes no sense to me.
I topped up my FB balance with like $2 or $5 dollars, in ?2006?. When Facebook (quickly) discontinued that silliness, my account silently disappeared. MARK ZUCKERBERG, YOU OWE ME MONEY!