Snapchat adds sponsored Geofilters, starting with McDonald's

Snapchat is experimenting with ways of turning ephemeral pic-sharing into a revenue stream. Instead of making the end-consumer pay, the app is turning to big brands to create sponsored geofilters (stickers and filters particular to certain locations) for the app. The precarious task of adding advertising can come at the cost of alienating users. Let's face it, people hate ads--unless …