[ra1n85]

>Is it possible that the network would become saturated?

That's on Comcast to handle as a part of building and operating a network. It should not be the concern of the customer.

[0x0]

Cost of network construction and maintenance is always passed on the customers, though. Without considering Comcast specifically, generally it'd be somewhat unfair and unreasonable if most users have to pay more to subsidize the "elite 0.1%"'s data usage. So I think it's not as black-and-white as you make it out to be.