Growth is a testing problem
Most ad accounts do not stall because the budget ran out. They stall because the testing slowed down. Once a set of winning creatives is found, it is tempting to leave them running and move on. Performance drifts down quietly until someone notices the numbers.
The accounts that keep compounding treat each review as a new experiment: new angles, hooks, and audience ideas, introduced as controlled bets.
Make review the default
Clavri proposes fresh variations and identifies underperformers for a human operator to review. Campaigns are created paused, and the customer approves activation and spend changes.