Burger King Mapped 14,000 McDonald’s Stores to Sell a One-Cent Whopper.

In December 2018, Burger King drew digital fences around more than 14,000 McDonald’s locations in the United States. Anyone who opened the Burger King app within 600 feet could order a Whopper for one cent, then receive directions to the nearest Burger King for pickup. The Whopper Detour ran for nine days. It drove more than 1.5 million downloads and pushed the app from No. 686 to No. 1 in Apple’s App Store, according to The One Show’s campaign record. Those numbers are impressive. The machinery beneath them is more useful.

Most app promotions pay people to install something. Detour required a full rehearsal: discover the offer, enable location, order, pay, navigate, collect. Advertising became onboarding. That distinction gives marketers a hard decision rule: if the campaign’s success event arrives before the customer practices the behavior you need later, you bought a metric rather than adoption.

Start at the moment of defection

The promotional surface was McDonald’s physical footprint. Burger King did not merely target people who resembled fast-food buyers. It waited until proximity indicated an immediate alternative, then made that context the condition of entry. The competitor supplied relevance, location and dramatic tension without selling Burger King a single media placement.

This is the first transferable mechanism: define the rival moment, not just the target audience. It may be the instant a prospect compares pricing pages, a buyer prepares to export data from an incumbent, or a viewer finishes a competing product demonstration. The useful question is precise: where can you observe choice becoming imminent? Targeting a demographic finds people who could act. Targeting a decision moment finds people already leaning into action.

The distinction also limits bad ideas. A location signal without a meaningful decision nearby is merely surveillance with a coupon attached. The context must explain why the interruption belongs there.

Make the reward pay for the detour

The customer journey was intentionally demanding. As Braze’s account of the campaign notes, a participant had to download the app, provide payment information, get within 600 feet of a McDonald’s, place the order and travel to Burger King. A routine discount could not carry that much friction. One cent could, because the reward was economically sharp and socially retellable.

Map the reward against the effort you are asking for. Count every unfamiliar action: account creation, permission, payment setup, travel, waiting, learning. Then locate the hardest step. If the value arrives before that step, customers can collect the incentive without adopting the behavior. If it arrives too far after, they abandon the path. Detour released the extraordinary price only at the competitor’s location, precisely where the campaign needed commitment.

This is why “make the offer bigger” is weak guidance. A strong offer pays for a specific piece of resistance.

Turn the campaign into a rehearsal

Burger King was relaunching mobile order-ahead, a feature that rarely earns news coverage on its own. The campaign made people use that feature end to end. Download volume mattered, but the meaningful completion was a paid mobile order collected at a restaurant. The promotion compressed future customer behavior into one memorable first run.

Build the behavior chain before the media plan: trigger, first action, permission, transaction, fulfillment, return. Mark the last step the customer must be able to repeat without the incentive. That is the adoption event. Every earlier event is diagnostic.

Inside OrionPilot, that means defining the success event as the final repeatable behavior and keeping installs, clicks and registrations as leading signals. The distinction prevents a cheap acquisition number from winning while the intended habit never forms.

Build the stunt backward from operations

Detour could fail after the clever part. The app had to recognize the right location, unlock the offer, accept payment and route the customer to a functioning pickup. The One Show record lists mobile ordering, navigation through Waze, social, film, outdoor and print as parts of one system. The creative idea was therefore also an operational specification.

Before launch, write a failure budget for the promise. Where can eligibility misfire? Where can inventory disappear? Which handoff can strand the customer? Who owns recovery while the campaign is live? If the promise can collapse after the click, product, service and fulfillment leaders belong in creative review. Their job is not to make the idea safer. It is to make the promised experience survive contact with demand.

A useful gate follows: no campaign earns approval until every advertised action has an owner, a fallback and an observable completion signal.

Measure the residue

The award submission reports more than half a million redemptions, over 40 times Burger King’s previous record for a digital coupon promotion. It also reports that mobile sales tripled during the promotion and remained at twice their prior level afterward. Marketing Dive’s account separately attributes the 1.5 million download figure to Restaurant Brands International’s CEO. These are campaign-reported outcomes, not an independent experiment, so they establish scale rather than prove which element caused it.

The measurement design is still instructive. Read the campaign in three layers. Attention asks whether people noticed and installed. Completed behavior asks whether they ordered and collected. Residue asks whether the behavior continued after the one-cent price vanished. Without the third layer, a promotion can look efficient while teaching customers only to wait for another promotion.

Set the residue window before launch. Compare repeat action, retained revenue or continued feature use after the incentive ends. The exact interval depends on the buying cycle; the principle does not. The coupon disappeared after nine days. The new route remained available every morning after.