American Express was considering a hashtag marketing campaign using a new technology called "hashtags-over-the-air" that allows content to be broadcast locally via WiFi hotspots and accessed through a mobile app. The documents discuss a case study of a campaign using the hashtag #AmexMakeMyDay and evaluate whether further investment in this type of location-based hashtag marketing would provide a good return on investment for American Express. They also describe the new technology called iPot that turns WiFi hotspots into radio stations broadcasting content aggregated under hashtags that mobile users can access through a nearby hotspot and app.