Spend cap and kill switch

Spend cap: a push or resume is blocked if the daily budgets of all live campaigns (lifetime budgets spread over their days) would exceed your cap. Each day we also check reported spend; if a day's spend is above the cap, the kill switch engages automatically and owners are emailed.

Kill switch: owners and admins can pause every live campaign at once. While it's on, nothing can be pushed or resumed. Only an owner can release it, and paused campaigns stay paused until someone resumes them.