Was the 29th of December and had 10GB left and it was either conserve heavily or just blow past it.
Imagine getting your 10% notice on the 24th.

I couldn't download any of the games that I bought on Steam for fear that I would go over my cap. Although, what's annoying is that you pay for the overages in such large chunks. The problem for me is that since you're paying for 50GB (1/6 of your original cap), you're going to want to make sure that you're not wasting it.
I still need to call up Comcast about them using December's 30
1GB usage as my last courtesy month. What was annoying is that they sent me a notice that I had passed the cap. After that, I looked at their site, and my usage was at 0GB, which told me that they had already rolled over to the next month. Their bar graph at the bottom also said that I had only used 300GB, so I figured that I was fine.
That's my concern, and unfortunately data wise there isn't really any competition to big cable and comcast which is unfortunate. I know there has been a ton of discussion on how much is "reasonable" use but with kids in the house streaming, gaming and the like, 250gb isn't high enough. I'd think 500gb would be more reasonable but even at that, what if they have friends over? What about the months we don't go near the cap yet they ding us the one time we eclipse it?
It almost sounds contradictory to say it, but it's almost as if they're "behind the times." What's weird is that the old model for Internet connectivity was unlimited (so being antiquated would suggest unlimited), which worked well for ISPs when most people barely used data. However, we've reached such a media-rich age (YouTube, Netflix, Hulu, etc and with higher definition content) that I'd be willing to wager that the low-end and median data usage has gone up considerably. They're "behind the times" because they refuse to accept this "new" form of media consumption, and want to penalize people for using it. That makes sense to them because Netflix and such are a direct competitor for Comcast, Time Warner Cable, etc.