Something irritates me about the answer, but I can't quite put a finger on it.

He's right that Amazon is a bad way of making money. I hardly ever get anything out of book links. His idea may very well not be a winner.

However... "try and make millions" sort of sounds like an excuse to never try. If the guy's young, why not try a few things that make some money rather than put things off waiting for a 'million dollar idea'.