Siral_Exan said:
it's a result of topic #41659, quite literally titled "The Great Cub Apocalypse". the TL;DR is that the cub tag's going the way of the dodo, so users participating have to fill in it's void with young_anthro, young_feral, and et cetera that all used to be lumped together into cub. this set's to help archive the tag so that when the alias gets approved, we can still chip away at it instead of scouring through young to add the aforementioned tags to their respective posts.

Ahh ok, that makes sense