The Goal
Profitable, and stuck
The account was not broken. Over the thirty days before the rebuild it spent 377 euro and returned 843, a blended 2.24x. One campaign ran at 0.98x and lost money. A couple of creatives did well for a week and then faded.
That is the most common state for a small store on Meta: good days followed by dead ones, and no way to tell which you are about to have. The brief was to make the return predictable enough that raising the budget would be a decision rather than a gamble.
The budget itself stayed at 15 euro a day throughout. Whatever changed, it would not be the spend.
