The second part is how it will likely be made, even though today if you select #amethyst, you can't subselect by your follows only. But we are going to change that.
The first part is still true, but the author decides if the post on a topic is also for everybody that follows him/her or if it is exclusive to the topic.
Interesting concept. It's going to make me wonder what people are posting about that isn't showing up in my feed, for sure.
I made this npub just so I could follow only hashtags, and so far I like it.
I use Amethyst almost exclusively on my phone, but when on PC I have switched to Coracle, and the ability to customize feeds with the latest update feels like a superpower.
