Earlier quoted context omitted.
I have known dozens of people who would gladly pay $20 a month to have a platform where they can freely share their writings and discuss with like-minded people -- small clubs, if you will. Some still use Facebook and complain about limitations to this day. Though as much as I'll never like Facebook, they do a good job and have the functionality; where they lose people is starting to shove irrelevant seemingly outrag…
I was going to say that $20/mo sounds a bit high but then I remembered that I still have a $20/mo VPS for pretty much that purpose (email, small websites) and I can't can't really be bothered to downsize the server even though there is plenty of room (except disk space).
Frankly I'd gladly pay $20 for privacy-preserving focused online service that does exactly what I want. And I believe many people would as well.
The problem as usual are others poisoning the well e.g. Netflix et. al. because they are kinda commoditized for many people at this point and they perceive them as impossible to live without.