Why would anyone have a Facebook Page rather than a Group? On a Page, Facebook just holds many of your posts to ransom. It limits your audience reach, unless you pay up hard cash to “boost” the post. I don’t run any FB Pages, but I do some admin on one Page, and it’s very annoying when this happens repeatedly on non-commercial posts telling people about things like local art exhibitions…

The “you’ll show it to more people” translates as “we’ll show it to more people”. It’s a protection racket for user-generated content, in effect.