Does Steemit count 
?
?I think OP is talking about new SocialFi projects rather than the older ones. Steemit indeed is quite a big name (from my POV). From what I know, people actually make money by posting content and receiving upvotes. It’s not just about making money but you get to connect with people and learn from them. I’m not sure if any project will easily replace Steemit.
Steemit and PublishOx are not social media platforms they both are blogging platforms like Medium. They cannot be considered as SocailFi projects in the crypto space. I have seen many names in the past coming up with the same concept but the success rate in SocialFi is less as users do not want to get paid in crypto but USD. That is why many users shift their base to more prominent names that pay a user in USD.