also the wayback machine works with the fediverse observer. so you can look here

I am not noticing anything on fiverse.observer. so i guess some glitch on fedidb?

Wouldn’t it be better if this was a peertube plugin?

Have you considered a UX similar to old reddit for this? where you hover over the join button with the mouse and it gives you the option to create a feed or add and remove to a feed?

I actually checked multiple times and could not find it (but admittedly maybe that is my mistake and not a real problem with discoverability).

Active users is the standard metric used to check how much a service is used (at least as far as i know. its what i see when i look at stuff published for investors).

hexbar is on the sixth place in term of number of active users with 1.8K , lemmy.world is 18K (enable the “active users” column and sort by it to see the full list)

Tagging users (for example “lemmy developer”), keeping scores of upvotes and downvotes, and marking comments as read and hiding them.

See the feature requests for lemmy i made for details.