@suricrasia didn't uncyclipedia have a (buttons based) text adventure? relating to their love of grues and thus Zork.

in a sense this would also include MUDs and MOOs. there is usually some level of admin gating.

maybe AI Dungeon also touches on this but that's more a relic of when people found text generation models fun and exciting. (way more emphasis on "Crowd-sourced" than "user submitted", sans writing prompts)

there was also a short lived fedibot based MUD.

nothing exactly what you seek tho