They did revise the FAQ recently:

"Yes. The philosophy of the Explorer Edition is "one device for one person," but we understand that there are situations where you might want to loan the device to a family member, friend, or colleague. Please don't sell, rent, or otherwise make a profit off the device. That's not allowed, nor is it in the Explorer spirit."

https://support.google.com/glass/answer/3064131 (Under loaning)