And they do provide a more or less generic fungible data product with the tethering plan. The price is $10/1GB data beyond the included data. It may be overpriced, a function of the scarcity of mobile bandwidth with current technologies and the lack of competition in this market in the US, but I find it much better than providers who only have an unlimited product combined with either insane overage charges or vague threats about cutting you off if you consume too much data.