So I just came across a community being used to solicit fake Amazon reviews. But I don’t see a way to report this to the admins. Since the user in question moderates the community they are posting spam to, it seems like the report button will just go to them?
You may also want to report it to Amazon since this is a violation of their TOS.
Feel free to report it if you can figure out how. I gave up looking for the right link on Amazon’s page.