I got staff picks once and daily snacks twice (for two different comics)
as a general, they don’t notify you.
i only got notified once out of those three because they needed me to merge some chapters together so there’s more content all-at-once
but generally, you’ll probably notice by a sudden huge influx of subbers (for me it was ~1k each feature for my fullcolor comic and ~500 for my b/w one) overnight !