First, I'd like to say I'm all for the "no data cap". I hate Comcast and I know how "evil" and greedy they can be.
Here in Canada, we DO have data caps. Mine is a paltry 90 GB/month. Using Netflix an hour a day use about 30 GB of this cap on a given month (To be fair, Netflix isn't HD in my case, but it would use double if it was). Windows update use about 1 GB, games installed via Steam about 30 GB. Visiting different web site thru the month and online gaming amount to about 5 GB.
Now, if you can do the math, this amount to about 66 GB/month of data (96 GB if Netflix was HD). You're telling me you cry because you don't have enough from using 5 times what I use (3 if Netflix was HD)? Go fetch some Kleenex little princess! I mean COME ON! You're spoiled, I can't see how you can logically complain with your stomach full... And to top it off, you get 50GB more for 10$!!!! I could only get 20GB for the same amount here and we have a hell of a good service compared to Comcast.
As I said, I'm all for the no data cap, but going over 300 GB of data in a month is a luxury. You use much more than the average person and to a point, it should reflect on the price you pay. Telecom company are greedy yes, but you have to realize you don't have such a bad deal here. It's like complaining that you still have to pay taxes on things you buy after you spent your fist million this month... Like you're gonna have some sympathy here...