Interesting, an old local forum used to have a rank in wich newcomers have restricted certain actions untill their posts get more than X number of points, then they will be granted the status of "New Full User", maybe this can be done with zaps instead?

You could post but not invite untill you have gained that status providing enough value in the eyes of the existing full members, I don't think that a time barrier can do that trick in the same way spending sats would but that is my intuition for now.