It looks like Google Glass will be an ad-free space, at least initially. On Monday, Google released its Google Mirror API, which lets third-party developers begin building applications for the smart glasses. In the terms of service for the API, Google states clearly that developers cannot serve ads to users, or even sell user data for advertising purposes. “Section 2: Advertisements. No Ads. You may not serve or include any advertisements in your API Client. Data Usage. You may not use user data from your API Client for advertising purposes. You may not sell or transmit any user data received from your API Client(s) to a third-party ad network or service, data broker, or other advertising or marketing provider. For the avoidance of doubt, user data from the API Client(s) may not be used for Third-Party Ad Serving (“3PAS”).”