One thing njump could do is have a mode for clients to link to it such that users would get the quick-preview opengraph stuff, but when clicking on the link they would be redirected to some specific client directly instead of going to the njump HTML page.

That would allow client developers to craft links that go straight to themselves (for whatever reason), so new Nostr users would go to the same client of whoever just shared the link -- while experienced Nostr users could configure a setting somewhere to specify that they want to bypass that rule and go to their own client instead, or to the njump HTML page.

Is that a good idea? Would any clients be interested in having this? Is this an attack against Nostr? (yes, it is)