messages resource’s queue lifecycle. You
create a queued mass message, then track its delivery and buyers.
Targeting with lists
Build the audience first with lists, then target the list when creating the mass message. Criteria-based list adds (addTopSubscribers, addQueueBuyers, …) make it easy to re-engage a cohort.
Reply-on-subscribe
messages also supports a reply-on-subscribe template — an automatic message
sent when a new fan subscribes. Set it once and new subscribers receive it
without a per-fan call.