[jaywalk]

It's a relatively new option. It may have actually not existed back when you signed up, or the rep just didn't know about it. Either way, I don't see why they'd want to hide it, because a consistent $50/month fee is much better than a large overage charge here and there that may or may not actually be paid.

[markovbot]

>that may or may not actually be paid.

Please tell me, how do I avoid paying overage fees? I have zero moral qualms about defrauding Comcast to the maximum possible extent.

[cornishpixels]

> that may or may not actually be paid

It'll be paid. Most of their customers don't have any other choice but to pay it. (Otherwise, most of them already wouldn't be their customers, after all.)