Cell phone plans have data tiers and pay-per-use. There's no reason cable companies can't do this either, except it prevents them from fudging costs.
I probably use as much bandwidth as anybody else, and I'd prefer to be accurately charged for it rather than have my provider pull shady net neutrality things or try to become an ad network or buy a media company to "bundle" their services or sell my data to third parties to juice their income.