It's just a fairly standard option on some forums. But it's now on this form: https://matrix.gvid.tv/submit/link
It should be helpful if someone wants to fill in a topic without sliding the front page. Though honestly we wouldn't mind the front page activity either way. It also may end up being how we handle nsfw subjects. We'll see what kind of etiquette forms.
Also soon we will have a "post whenever" option that will make it so if you post a ton your posts will be spread out over time (as an option).
there doesn't seem to be anything here