In theory the service operating costs could be spread across region differences such that in other areas it was at a loss to build and preserve market share and in richer areas it was making up for that.

But yes, in reality it’s just exploitative “what we think we can get away with” pricing to “maximize shareholder value” (which is largely BS as the vast holders of shares are very small clusters of the population but people with a handful of shares in their 401k think that statement is talking about them).