The Daily Digger costs a modest 99c a week, which looks like a fairly cheap way to get a daily newspaper. The only problem is that you have to buy an iPad in order to read it. This chart comes from a lovely blog post by Bryan McComb in which he calculates how long it would take before a Daily Digger subscriber would be better off buying the iPad version rather than purchasing Murdoch’s New York tabloid from a newsagent. The breakeven point comes in November 2014.

(And, yeah, I know that iPad owners don’t buy the device just to read the Digger. But still, the calculation illustrates how cheerfully we early adopters write off substantial expenditure.)