I actually went well over the cap last month, 315GB according to both Comcast's metering and Tomato on my router (I'd rebuilt the server that runs my Tor relay,

I actually went well over the cap last month, 315GB according to both Comcast's metering and Tomato on my router (I'd rebuilt the server that runs my Tor relay, but hadn't cranked the bandwidth settings back down, and it ran for a while flat-out). I was sweating bullets, but they never said a thing to me. Most months I do get into the 200GB range, so it doesn't take much to get close to the cap.