Sure, he made 2,500 guilders in 5 minutes, but the author says of his early QnX days: "After a couple of visits there to talk over strategies on how to solve certain problems using QnX [...]". So to me this anecdote is about how guy spent an amount (several days? months?) learning QnX, getting involved in the (1-man) community around him, and became somewhat of an expert in QnX such that when the time arose, he was the guy they called.
The way the story is told is akin to patio11 saying "an easy way to make a quick buck is consult with a BigCo!" True... but that ignores the time, effort, and experience Patrick has put into building his skills.
TL;DR: "Invest time in learning something valuable" is a better takeaway from this article, IMO.