Great questions! The IP whitelisting is short lived and only happens after you connect to our relay. You should have no issues moving the content links directly to the browser. Yes, all the people on your IP would have access to the content you have unlocked but they would still need the links or access to the content on the relay to get them. If you shared the content links with them, they would have access to it. We hope to move away from IPs all together and use NIP-98 instead (signed nostr event in the header of the content link request) but it does not have much adoption at this time. Soon, we hope!