I posted this:
https://crazypeople.online/post/8762505
In my logged-in view from db0, I see no responses and received no notifications. I thought my thread was ignored. Then I accidentally encountered my own post directly on crazypeople.online while logged out. And I see two responses. I wonder how that got messed up. Those somewhat high-effort posts would have gone unnoticed by the person they were directed at if I had not incidentally noticed them.