As you may have heard, Google began giving Gmail-like invites to Google Glass users. In short, when Gmail launched, Google let those with Gmail accounts to invite others to get Gmail (it was a limited beta as well). Now, Google has opened up to a select number of Glass Explorers the ability to invite friends to purchase Google Glass.
Here are screen shots of what the invite to invite email looks like and what happens when you click invite a friend:
This is an incredibly tough decision for a Glass Explorer. Who would you invite? A fellow developer? A friend who is not a developer? A family member? Someone who pays you off? ;-)
Google said they have sent out all the invites to invite for now and there may be more in the future.
I suspect Google had some excess Glass devices to sell because some of the #ifihadglass winners probably decided not to go through with the large purchase. So this is their way to get rid of that excess.