Oh, I am aware of how to activate zapping individual posts on Damus. It just frustrates me that this extra step even has to be done. They can't even mention it in the Damus UI anywhere, so there are surely a lot of users who try out Damus, get frustrated they can't zap posts at all, and go back to Primal. It's only the ones who think to ask if there is a way to activate zapping that end up getting informed about zap.army.
As for Nostur, my bet is that nostr:npub1n0sturny6w9zn2wwexju3m6asu7zh7jnv2jt2kx6tlmfhs7thq0qnflahe had to do the same thing as Damus, and you can only zap profiles, not posts.