See #1-4 on this note. That is a big issue here. 

The current top accounts within niches must do better interacting with their followers and amplifying more voices until there is a distributed foothold to maintain them. People do not want to join a social network just to feel isolated -- they can get enough of that in society. 

https://primal.net/e/note1elej9ewwhwvtlmamjvwr86swxgv92m89ph8ecxga4npk7tfq8u8svks28z