People don’t want to see uninteresting replies and casts.

Best way to solve for that is weight historical inbound engagement for a user, i.e. PageRank-like score for every user.

Disproportionally hurts new accounts. Making it harder to get started.

maybe this could be counterbalanced by an algo boost for new accounts with interesting casts?

Algo boost for new accounts + craft a more engaging onboarding experience to push users to join channels and post in channels. Let each channels decide what is considered HQ and what isn't through community moderation. Weigh that into the algorithm of someone's "rank"