Making a list manually is time consuming, but a good dev could do it easily, in my opinion.
For the second part, each curator and curator group has its own guidelines, but I'm not curating or encouraging any user that posts on the other chains to be curated and although I can only speak for myself, I'm not alone.
Yes I will ask a developer.
We can only speak for ourselves. That's how a movement starts.
Thank you! What you do is appreciated 🙂