Definitely the case especially since they were on Amazon, and thus had to pay for EC2 minutes.

Now that they're at Facebook, server load shouldn't be a problem anymore though. So they could implement that.

What about sending a video stream to the server and then when you hit the button it just sends a timestamp that determines which frame to extract on the server and delete the unneeded ones?

The future is going to be sweeeeeet.

Problem there is quality of the image.