I felt that was a disingenuous part of the chart. The author said that FaceTime only worked over cellular for AT&T when you moved to a shared data plan, but always worked on Verizon. That's technically true, but only really because Verizon won't offer customers subsidized pricing without moving to a shared data plan.
From Verizon's perspective, if you pay their post-pay rates and bring your own iPhone, you're paying them an additional $18+/mo since they don't have to cover the subsidy. As such, if you have a grandfathered plan, they care less since you're basically paying for a higher rate plan by not using a subsidy.
From Verizon's perspective, if you pay their post-pay rates and bring your own iPhone, you're paying them an additional $18+/mo since they don't have to cover the subsidy. As such, if you have a grandfathered plan, they care less since you're basically paying for a higher rate plan by not using a subsidy.