Sorry it is so poorly done, my sketches were better but I wanted to play with my clay a bit.
My idea is for Airbnb to run a promotion where if you travel with them within a set time period, they will send you a world map, a customized push pin, and a small box of similar pins (different color and not customized). The similar pins are to mark where you want to go and the customized pin marks where you went. People would also be able to order additional pins as they continue to travel for a small fee. The idea is to engage people in deciding where they want to go and the map will remind them to go with Airbnb.