Earlier quoted context omitted.
That's a good point. It's one thing to offer "unlimited data" for a fixed price - which is about ideal for a consumer, but that doesn't exist anymore. What you get is a fixed amount of data for a fixed price. But the provider has an incentive to make you use as little as possible, to increase its profits. But if instead you get the data returned to you, or you pay a reasonable amount by the MB, then the provider has…
> It's one thing to offer "unlimited data" for a fixed price - which is about ideal for a consumer, but that doesn't exist anymore. Yes it does; both Sprint and T-Mobile offer it (alongside their respective non-unlimited plans). The fact that Google Fi doesn't despite using those two carriers as its "partners" is incredibly disappointing.
It's like an insurance "death spiral"[1] -- if one provider provides fixed-cost internet (or wide "bands"), the customers who use the least data will subsidise those who use the most. If another provider offers them internet at the true marginal rate, they'll move there. After they've moved on, the fixed-cost internet provider has to increase its rates, rinse and repeat.
Of course, customers may prefer to be insulated in the months they use more data than usual, and moving between providers may not be free, or they may just not care at all...