Google Glass It is already out there and at the moment the experience they provide is subject to the company's services, however, its API was released to allow other developers to build experiences with the smart glasses of their own services or applications. Several companies with some advance have developed applications such as Evernote, New York Times or Path and the social network Twitter is already working on it as well. But of something we can be sure, the applications in Google Glass will not have advertising because its API expressly prohibits it.
The code of the innovative Mountain View device has very strict terms and conditions that seem to try to shield the company from any legal problem derived from its use.
They say it very clearly:
No ads. It will not serve or include any ads in your API client.
It seems like a commandment, but it is there as I tell you. And they continue to assert that Users' personal data may not be used for advertising services and that they cannot be sold to third parties for those purposes. You will not be able to charge for the applications either. and it is not allowed to promote purchases from the application of functions that have to do with it or virtual goods of any kind.

In addition, they warn that they should refrain from using the API in places where there may be danger of death, physical damage or environmental damage. One of the examples that are put are enclosures related to nuclear energy.
From the beginning we saw how from civil societyAs well as from the different governments, this technology was looked at with attention and suspicion. At Google they seem to be very aware of the legal barrage that can befall them. An initial shield seems more than recommended and then perhaps the hand can be opened. The truth is that it is unthinkable that someone could accept advertising directly projected onto their retina that would be added to all that we already have to endure between television, shop windows and the internet.
Source: Android Authority