No, they don't. They advertise that the camera can "turn into" a webcam with the right software or through HDMI out.
It's like me trying to sell you a car that can "turn into" a boat with the right attachments. Notice I didn't say how much the attachments cost.
> Use the EOS Utility Webcam Beta Software (Mac and Windows) to turn your Canon camera into a high-quality webcam, or do the same using a clean HDMI output.
Canon advertising its potential to be used as a webcam doesn't mean it's a webcam. It means you can adapt it for use as one. And you still can. The adapter is an HDMI cable or software, which may or may not be free.