Lots of events and custom tags on Kind 1 (like appraisers, for instance) only show to other Amethyst users. So, the general expectation is that many things they do on Amethyst won't show up anywhere else. Here and there we see somebody surprised about it, but they get it pretty quickly.

I don't think it is a good idea to ever communicate that clients show the same thing because it is almost never true. Especially these days that each client has a completely different way to assemble the main feed.

I definitely encourage my own users to use other clients and see the difference for themselves.