For example, I buy too many VST audio plugins, stuff that I don't really need as a hobby musician. I know that I don't really need them, but from time to time when they are on sale, I like to buy another one just for fun, for the immediate satisfaction of trying it out. I can easily afford this, it's just a part of spending my modest discretionary salary (most of which I save). The habit gives me a nice feeling. What's wrong with that?
Maybe the author needs to take it a bit more easy?