Really cool. This zapbox relay can work really well as a "Patreon style" reserved area for subscribers, without the hassle of managing a monthly payment. You can also have more zabox relays with different thresholds, and users will automatically fetch notes for their tier.
I've made this other relay now: https://zapbox.fiatjaf.com/
First you have to set up a zap threshold, afterwards anything you publish there will only be shown to people who have zapped you at least that threshold in the past 3 months.
All the rest is the same as a Lockbox:
Discussion
Exactly, that is the idea.
Maybe the relay could return an explicative note (every 24 hours) when the user queries a specific author but the threshold is insufficient, so he is alerted, can zap him and access again the content.
A nice variant of the relay could be use its pubkey as zap target, and allow reading all notes from authors that have write access. This would work well for a team (e.g. a magazine, a project, etc).
The problem is that if you're querying a specific author then the relay can't return a note from someone else, that will be discarded automatically.
I like the idea of relays as zap targets. That fixes a lot of things. Would be nice to have that built in clients somehow.
