The cost in electronic services is in acquisition; the nominal cost to deliver services to a paying subscriber is lower than acquiring a new one.

Yes you would flatten your margin with existing customers by not hiking their rates (or not as much) but pretending there won't be defection assumes near monopoly--which the US has permitted largely for the last 4 decades.

Cell phone companies made it super easy to leave by only offering good discounts to new customers.

Then you don't understand why long term reliable customers are better than intermittent ones...

Which means you don't know anything else about business, and are just going off vibes