Picture invitation. Invites appeared on Habré

Invites appeared in Habrahabr. For some time the registration was closed, but today invitations for registration were distributed in test mode. The system itself is interesting: a 24x24 px picture appears on a unique link. It must be saved to the computer, and during registration attach the image with a unique name to the form. Then fill in the name, mail, password ... And here it is, the new user Habrahabra!

The picture is colored. When an invite uses it becomes black and white.
Users have no invitations yet. But they have a UFO, which arrives and distributes to good people%)
I have one more :)

UPD: In the profile at the address moink.habrahabr.ru / invites / one invitation appeared. Everyone has? Or because I wrote a post?