An Arecont 180 Covering Supermarket Registers

Take a look at this image of an Arecont 180 covering registers at Whole Foods:

A few things of interest:

• I couldn't find any cameras at the individual cash registers (at least 8 at this location). Maybe I just missed them or perhaps this camera replaces them?
• The ceiling of this Whole Foods is quite (~30'/10 meters). You can see the long extension mount used, though the camera is still far above people's head, even when one is directly underneath.
• Overall, though, this is a very low cost front area surveillance option, though I wonder if it's really the only camera covering the registers, especially given its mounting height.