I don't follow this comment at all. What does this have to do with profit and revenue? If I am profitably selling something direct in Chicago, and I have the choice of waiting for enough profits to accumulate to light up an NYC sales office, or I can take $5MM and light up NYC, SF, Atlanta, and London, then I am in fact in a position to "buy profits".
Similarly, if I'm doing mass-market promotion limited by budget and have a cost of customer acquisition that's far lower than my customer LTV, I can slowly accumulate enough proceeds from my business to gradually increase my marketing spend, or I can take $5MM to go nuts with it. Again: so long as the metrics stay steady, I am "buying profits".
It's not a mystery. There's no law that says that straightforward things you do with VC money can't generate profits. In fact, the premise is the opposite.