Seeing a post like this with over 100 comments makes me think that it's going to last, but scrolling down and seeing 25+ posts in a row with zero comments concerns me.
It could be a federation/Jerboa/other issue though, I'm still not 100% on everything works and connects, plus I imagine the sudden rapid growth is hurting it for now but that should settle eventually
Alot of bots posting, or certain communities bulking out their posts at once. Scroll by new and you will see 5 or so posts to a sub in a row by the same person.
Go to a post, click the community or user, then find the menu that says block. Not sure what your using. On jerboa it's top right i (information icon) but it's prob just a hamburger or something on web.