Yes, there were plenty of them and all of them failed. It's even not as easy for defis to stay afloat in this market and a lot of people have moved back to centralized exchanges for their trading needs. In a similar manner, centralized social places generally provide a better service and platform for interaction and exposure. It's like we can make a better looking and fancy alternative to the forum but can't necessarily be able to move the userbase to that site. For a socialFi to success, it should be a good social place to start with. For example, telegram could turn into a socialFi if they carefully take the right steps.