> 'A movie theater chain recently analyzed their user data and discovered that 72% of their profits came from concessions, primarily from impulse purchases made by people who swore they "wouldn't buy anything."'
This combination of non-descript source, precise numbers, and 'quotes' looks like the usual bullshit one reads in self-help books. I conducted a quick online search but couldn't find any direct source for this claim (although the number might be in the right ballpark).