My loose understanding of that is if the pubkey is on the paid whitelist of a certain relay then they should accept the forwarded message from this relay. But there's also an "authenticated" flow for some paid relays and that I believe won't work.
Ok, thanks. I saw the paid relay nostr.wine in your code. This is good.
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That's just a few fallback relays, need to add some more. We mostly use the list from nostr.watch which has hundreds of proxies.
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