jointhefediverse.net seems to be a commonly linked resource for directing people to join the Fediverse.
Curiously, it does not list Lemmy under the list of Reddit alternatives. Their GitHub README explains why.
Previous relevant discussion: https://lemmy.ml/post/78808
Well to me that doesn’t fit the “it’s default” description.
While looking at that, I couldn’t see lemmy.world on that page. I found that join-lemmy.org now excludes instances with >30% user share in order to dampen centralisation. Which makes sense I guess.