I see you've never met the typical HOA. Let me explain...

One person who usually isn't even the 'president' but still sycophantic about it creates a private group, which only he or she can delete things or add people. Then they distribute flyers every couple weeks informing you about it and how you need to join.

HOAs here are unfortunately the lesser of two evils, but they are far from a good thing.

The goings-on of HOAs typically aren't publicly posted unless required by law. They'd rather keep it to the neighborhood and not have others up in their business.