For comparison, AT&T had a monopoly only on long distance, so people could choose drastically different behavior if they wanted to defund AT&T. I.e. you didn't need to move out of the region where most of your relations lived but it was a better deal to pay AT&T's tax (and regional monopolies charged more than true long distance on many regional calls). Potentially making a lot more money and having an entirely different life out weighed higher than market phone rates that made AT&T a successful cash cow.