How does the spending cap protect me?

The cap is a wall, not a target. A 5 percent safety margin (at least $15) comes off the top before the plan is written, and then a guard checks spend every 30 minutes:

• 80 percent of the cap: you get an email. Nothing changes.
• 90 percent: the daily budget is turned down so the rest lands under the cap. You get an email.
• 95 percent: the campaign pauses. You get an email.
• Spending more than twice as fast as planned: the campaign pauses, even under the cap.

The emails go to the person who approved the campaign. The campaign page shows how much is spent against the cap with a progress bar, and says when the guard turned the daily budget down.

A daily advisor also reads the campaign once a day. It can only slow spending, never raise it.