They don't relay your data to other relays. They just store it, like a regular relay would. However, your followers will connect directly to them, regardless of your followers relay setup. That's how the outbox model works. It doesn't use fixed relay lists. The relay list is dynamically assembled from a super set of relays from everyone you follow.
Without knowing that (and pretend I'm a normie) I am inclined to just use the biggest names I recognise like damus and I am also going to include any paid relay because I'm assuming they're going to do a better job than a free service Lastly (as a normie) I'm inclined to simply copy the same three relays from the outbox list to the inbox list because I don't understand the difference I'm only half being serious here (playing devils advocate) because I do appreciate what you are trying acheive but as a user the app is really making me think... I just want to set it and forget it... I'd be happy if this was automated for me I've paid for nostr.wine so I'm just going to put them in every section of that relay setup page 1st then damus second and another big name 3rd Not too sure if thus Feedback useful to you but I hope it helps
That's awesome. Nostr.wine is great for an Outbox relay but doesn't really work as Inbox, since it charges to post. People sending you replies, zaps, likes, etc will have to pay for Nostr.wine for it to accept their posts. But the others work, you can use nos.lol, damus or nostr.mom as Inbox. For PRIVATE Inbox, where your DMs go, you can use auth.nostr1.com or inbox.nostr.wine (another payment) to keep your DMs VERY private. Or just add nos.lol or nostr.mom to make it less private, but allow Amethyst to provide DM notifications.