Please can some one explain to me the difference between the $50 and the $60. The only thing i see here is additional data usage and the On0demand things, what do they mean by Additional data usage. I know that they do packet inspection and all and deep packet inspection, but this would take a large amount of resources on there end. i thought they are all unlimited. I mean the On-Demand is cool if you are a security guard, you have nothing better to do then watch TV or read. PLEASE I NEED MORE THEN THE OBVIOUS. for all the Cpt OBVIOU's out there.