LIFECYCLE SIGNAL: THE INDUSTRY IS HITTING “STACK SATURATION”

Summary from the TLDR Marketing newsletter

Lifecycle marketing is reaching stack saturation, with many discussions focused on turning systems off rather than adding new ones. Win-back flows can harm sender reputation when overused, pushing teams toward shorter re-permissioning windows and suppression lists. Organic social is increasingly used to move users into owned channels like WhatsApp or SMS through direct opt-ins. Transactional emails are often underused as engagement signals.