That is just used to get your home relays. We only use that if we cannot get your nip 65 relays from our bootstraping relays. Your nip-65 should be sent everywhere and thus it should be on our bootstraping relays too.  

 Ahh, I see, that makes sense and clarifies my confusion - Thanks.
What's the recommended way of updating the NIP-65 list?
Just setting the relays in a client that supports pushing the updated NIP-65 list to relays? 

 I see metadata.nostr.com also uses kind 10002, so that should be a good starting point.