It's interesting that they are doing this in a public feed. Looks like they don't care if their followers see the same activation message over and over again.
Discussion
I'm not Japanese (forgive me if this comes across as appropriation).
From what I've seen, if you browse through Japanese feed, you'll rarely see replies/threads- actual replies are posted as new notes without tagging original post. I've come to understand it's how they use SNS - it seems more like a collective stream of consciousness.
I'll be grateful if it's possible to remove mattn-san from spam but understand if you don't want to start making exceptions.
(I'll also try requesting mattn-san to delete the posts but not sure he'll see my note)
Also mattn-san is the author of Nostr CLI client Algia. So asking (very indirectly) on behalf of a fellow dev 🥹🙇♀️
Very interesting. I am adding an exception for this. The app doesn't consider small messages spam. In the past, linking to a user would be a short message with a tag like #[n]. Now we use these nostr: urls that can be quite large. The person's message fell into the filter just because of that.