Ultimately every purchase you make is a vote in support of the company/org you are buying from. Why do you go to one grocery store vs another? One hairdresser vs another?
Maybe I'm misinterpreting the blog and/or comment, but if I don't need groceries, and can list 20+ reasons why I don't need groceries, I'm not going to get groceries anyway just because I like the grocery store very very much.