1. If you have people in the Substack ecosystem with credit cards, and they’re getting everything — videos, podcasts, letters — unless it’s mirrored completely, it’s better for them not to be switched. But there is a minority that would probably volunteer their emails for new/extra content that went out via nostr. If the entire ecosystem were in place here, I would just import the entire list in that case. But if it’s only newsletters (and no payments), I would make it opt-in, and do different content for those users.

2. Yes, Highlighter is good, and that’s a good point. No need to re-invent the wheel — could just compose there, send via npub.pro.

4. I’ll look into it — some of the video files are 2GB or whatever though.

And no problem — thanks for building these tools!