What's the point of a marketing video that you can't share? For one, it creates an aura of mystery and exclusivity perfect for a lingerie brand. ACW Grey Tel Aviv and Delta Lingerie created what they're billing as the world's first Facebook Poke campaign. Using the app, which lets you send temporary self-destructing messages to friends, the agency got a film of a model getting dressed, filmed by the model's agent. It was shot on Facebook Poke, then sent to the model's Facebook fans. At the end of the film, it directed customers to the brand's website, where they got a discount on the garment the model was wearing. The film promoted the company's One-Time Sale. Since you can only send videos on Poke to 40 people at a time, the agency had to shoot a new video every 40 people.