We are so used to the idea that a social media network has to dominate the world - ekse it's a failure. If Lemmy, Mastodon, Pixelfed or your old fishing forum is enjoyed by some people, it's a success.
It's a capitalist habit. People are so used to every company having to maximize profits that they forget this is just a space to share and talk about stuff, not an entity aiming to make a profit.