The Economist has long had the Big Mac index, a surprisingly useful index for all kinds of things (though the magazine use it primarily to track over/undervaluation of a local currency. The Big Mac is a useful indicator because it is locally produced with local labor, but subject to stringent standards in terms of production and provisioning.
The digital version of the Economist, on the other hand, should be the diametrical opposite of the Big Mac – it is the same all over the world (the Economist does relatively little tailoring of its product, seeing its customers are globalists) and the price for delivering it is, of course, the same in all countries (with some provision for sales taxes.) Consequently, you would expect the product to have one price, all over the world.
Alas, that is not the case.