forget the generic "welcome series" advice. here's the order i'd actually build them, sorted by dollars. failed-payment recovery first. it's the highest dollar-per-minute thing you'll ever set up, because it recovers revenue you already earned and lost to dead cards. trial-ending second. people decide at the deadline, so a reminder 3 days out converts fence-sitters who'd otherwise lapse by accident. activation nudge third. drives the signups who never reached value, which is the ...