Question for my librarian friends, without fees, what incentivizes library goers to return books on time? Especially on those recent and popular items with waiting lists?

This, right here, is why I tell clients not to rely solely on platforms they don't control.  Facebook and Instagram are great for marketing, but if you don't have your content in a place that you own and control, you can be closed down because Facebook is down (or doesn't like your content).

Help us Jeff Goldblum, you're are only hope.

I believe that the USA is the only country in the world where someone can attempt to assassinate its leader, not get the death penalty and eventually be released to the public.