This article seem to be centered on Dutch culture (Which I have discovered the hard way is one of the most stingy frugal culture you could ever imagine).
The Dutch being frugal is well-documented and well-known [1]. Are you suggesting we should just pretend it is not the case and act as if we all thought exactly the same way? This article is only relevant because it takes place in that exact culture.
My (American) brother in law calls me cheap. Which is what frugal sounds like to me. As a native Dutch I call myself cheaper than the Scottish. When I go out shopping, I will spend hours looking and not buying anything.
I don't think stingy fits the bill per se since that would be saving money at the expense of others. Almost like the coffee shop customers who are not buying anything?