I know I said this elsewhere but I feel it's important...
T&C or "fair use" does not give an ISP the right to advertise something as something it isn't, period. This exact thing has been through the ASA before and the ISP was forced to stop advertising or calling that service as uncapped even after they moaned, gave excuses and pointed to their T&C and fair use policy.
There is no middle ground here, it either is or is not uncapped, 200Gb or 1000Gb is not uncapped, if that's the limit they should advertise it as such so someone else can reap the benefits when they advertise their uncapped service which isn't capped at all letalone at 200Gb etc.
It will only take 1 person to get cut off due to heavy usage and they can go to the ASA which will, as with the other ISP in a past complaint about this exact thing, force them to stop advertising it as uncapped. Doing so isn't just about nitpicking, again, it's so that an ISP that advertises a service as uncapped and doesn't cap it or otherwise stop you can reap the benefits they deserve by proving what they advertise.