There is always a reason.

My corner grocery (run by a family that lives a couple blocks away) did the same thing - they dropped the soy milk brand I like. I asked about it, and they brought it back.

I think they do cost more on average than HugeCo (if you use the HugeCo surveillance/loyalty card), which also theoretically has a larger selection, etc.

But for some weird reason the store that sells me what I want gets my business.