Can someone help me understand the economics of these incentive plans (where these companies subsidize your early termination fees, etc, to attract customers?)

Is this along the lines of what all these other companies (Amazon, Netflix, etc) are doing where they bring you in at low rates, sell to you at unsustainable prices, and then plan to increase prices over time (or do what they have to do to start turning a profit?)

Or is there a chance that, even after these incentives, prices will remain competitive?