Sometimes a boring but previously popular product finds a new niche in a different country/culture and booms. That boom could reach all the way back to the home country, because they innovated elsewhere (while protecting their base cash flow).
Is it less boring because they added few flavors? Not to mention that Kit Kat in Japan is really just another kind of cheap sweets among hundreds of others. Is there anything to learn here? Is the article thoughts provoking? I thought those are key points not to get flagged in the first place.