Why no iStore in Rustenburg??

I made a rough count about how many iStores there are in Tshwane/Pretoria. I count at least 5. (I include Mall of Africa...) At least 10 in Gauteng. There might be more.

An not a single one in the whole province of North West, at least according to my memory. I am sure there are enough Apple users in Rustenburg only to justify opening an iStore in Rustenburg?