I guess I would be labelled as a pirate then..
My usage is around 1TiB/month at the moment virtually all of it over VPN and all legal. For starters I host an offsite backup for work which sends approx 15-20GiB each night over a VPN. I also push all my traffic over a VPN which includes Netflix, browsing, Youtube - as well as Steam downloads which can soon add up!
Why do I use a VPN? Privacy - these days it is just as easy to configure it in my router so it is permanent and works across all my devices automagically.
Biting the hand that feeds IT
