Reddit has 110 million daily users
They had 54 million before the surfacing algorithm became central in 2021
Enough people hate algorithmic manipulation that a competitor stripped clean of it could do well
Following topics is an easier sell than following people
Nostr is only doing as well as it is because a subset of Bitcoin Twitter moved here when nostr:npub1sg6plzptd64u62a878hep2kev88swjh3tw00gjsfl8f237lmu63q0uf63m did. In some sense, the entire user base is the “Bitcoin” topic. It would be great if an entire existing community could move to Nostr rails without being turned off by Bitcoin talk. Think heavily censored groups like anti-vax moms. People who don’t like Zionism. 9/11 truthers.
Mods allow for white list posting, which these sorts of communities are already very familiar and comfortable with. They just need a platform that the whole community can’t be banned from.
Reddit imo was a solid improvement over the traditional forum, because it allowed the group to elevate the most interesting or helpful responses to the question/post. But it was still a defined space of likeminded people.