In addition to the normal free relays we broadcast notes to we also follow NIP-65 which states:

“When broadcasting an event, Clients SHOULD:

Broadcast the event to the WRITE relays of the author
Broadcast the event to all READ relays of each tagged user”

However, we have to have some limits to avoid spamming notes out like crazy. As such, we only do this additional broadcasting to the first 5 tagged users of each note and only to a max of 4 “read” relays per npub. 

Keep the questions coming! Happy to answer 🍷 

 Super cool. Thanks for the great answer (and best in class service)