For years I've thought that dating sites could benefit from such post limits. If one could write 3 posts per day I think one would be more careful about what is posted and success might be shifted a bit from quantity of posts to their quality instead.

I like the idea. I think it would be nice to read in SlowSocial how will posts be treated. Will the company's algorithms read them? parse them? Put users into categories? I assume not, but it might be nice to display this in the front page.

And maybe there are useful ideas in https://www.humanetech.com/technologists ?