NRS Question: How Can There Still be an Advantage When c - A is Positive?

I have a hard time believing the c - A in NRS when it is positive could produce a positive advantage still?

Can anyone explain to me how this is possible? Perhaps give me a reason, or an intuitive explanation why it is so.

As it stands, I never bet anything but the minimum bet when c - A > 0.

e.g. c = -11. Running count is -18. According to NRS this is still a positive edge (-11 - (-18)) = +7 when a half deck tracking slug is cut into a 1 deck playing zone.

-7 more high cards came out than was anticipated by the tracking slug of -11 yet I am to bet more than the minimum?