This is an interesting sneaky way of making social media a subscription service for many, but I'd think the benefits for any business seriously using social media are probably good enough to justify the fee. That said, why offer 2 different payments for web and mobile? This just introduces too much confusion for an entirely new concept like this.
Anything that gives people some possibility of human contact in the event of a problem is a welcome baby step forward, but this isn't really good enough. If Meta screws up something with blocking/banning your account and you're not subscribed, are you still completely unable to get in touch with anybody, for any price? These are the people slipping through the gaps that I worry about.