Convenience Store Bonus!
Taiwan seems to have many more convenience stores than any other place I know of. Actual supermarkets are not common outside of big cities, but almost every city has at least one convenience store. The town of Cingjing, which is really just one winding mountain road, has three.
I think a big part of the success of convenience stores in Taiwan has to do with marketing. Characters like Doraemon and Hello Kitty exist in other Asian countries, but it is only in Taiwan that 7-11 has a promotion to get Doraemon products. This time around, for every 77NT spent, you can obtain one Doraemon point. After 10 points (or 5 points plus 39NT), you can redeem the points for a Doraemon on some sort of transportation. While I was in Taiwan, I managed to get Doraemon on a bike and on a plane. Both have LED headlights that can be turned on.
I am not sure how they make a profit, since in many places outside the big cities, the convenience store is actually the cheapest place to acquire various basic food items like bottled tea or chocolate.