I remember I had 2000GB uploaded on one of my Unlimited hosts. Forget their name, but they are probably out of business by now.
What they were doing was being extremely cocky about their $25.00/mo unlimited hosting package and so I simply decided to make a script that duplicated a 5Gb nulled file, while letting this run throughout the day I managed to get my transfer to some glitched amount (2.147) while my actual data was nearing 2.5TBs.