There are social network UIs written for Matrix the same way ActivityPub is used for Lemmy and Mastodon and Flickr-clones. I expect these to multiply as the protocol gains more features too. Recent Matrix enhancements are about modeling content relationships, seemingly to this end.
And yes, the entire foundation structure of the platform and protocol are quite different, that's kinda the point. ActivityPub and Matrix protocol are similar in this regard. And yes the AP impls are seeing huge explosions in growth in the last 3 weeks.
Riku, I can't reply to you because this site is a joke, but I don't think I want to anyway, you don't seem to get the point, across the board. Not everything is about profit for bleep's sake. Also, I'll sign up for s month of reddit premium if you can find 3 subs that voted to re-open. Or literally any single person besides you and spez that think every single app dev is scamming, and nearly every single mod.
And no reddits infra is not a most, lmao. Their site crashes daily and runs on AWS, and every single bit of value is derived from the people you accuse of spamming - you know the ones that keep voting to keep the homepage looking like a wasteland of porn and AITA posts. You're completely out of touch.