Here’s an interesting promotional mechanic from Scandinavian Airlines that requires 2 people (couple up to buckle up!) to work together to access special travel deals offered by the airline. Based off the insight that “people book trips when they sit down together”, in order to redeem this offer, you need to be pair up your phone next to your travel companion. See video
Couple Up to Buckle Up from Tobias Carlson on Vimeo.