Since many of the people who work on the Stripe product are users of it (half of them had already used Stripe before they joined the company), they have a good feel for what product improvements might be usefulor important.
Language education is already pretty good in many countries of continental Europe ( Is French or German more useful when it comes to travel in Europe?).
But I consulted with two of my best career advice sources, and they thought he had some good ideas, though his tips may be most useful for people who work for themselves or run small businesses.