Pretty much all of these subs show no content or content from 3 years ago and the activity is 1 user per 6 months. They don't even change if i refresh the page. Why are they considered trending?
The trending communities UI only shows communities local to your own instance and right now seems to strongly prioritize new communities specifically. That leads to weird results on lemmy.ml, since new community registration is closed.
I get that on hot after only 5 posts. Everything after that is a minimum of 1 year old, and only the first 3-5 post are recent. It's kinda funny reading the comments on those posts as there are a lot of lost people commenting on it right now, thinking it's something recent.