Every action runs against a holdout group that gets your normal experience. We compare the two and report only the incremental difference. If a purchase would have happened anyway, we don’t take credit for it.
Most brands see a clean read on their first lever within a few weeks, depending on order volume. Higher-volume brands read out faster because the holdout fills sooner.
It varies by catalog and how much room your current flows leave on the table. We’ll size the opportunity honestly during onboarding rather than promise a number we can’t stand behind.