Interesting that the "Spare Tyre Kit" doesn't include a tyre unless you select that option.
Most KIAs in Australia come with a spare tyre kit as standard, and that usually means a wheel to match the other four (i.e. alloy, if fitted).
I see it as a definite sales point for new cars. In many years (and kilometers) of motoring, I've only twice had a flat on the open road, but I've been very glad that I was carrying a spare. I've also experienced a few flat tyres in the driveway, and again, it was handy to have a spare.
Australian KIAs come complete with tyre kit and tyre.In America, (I personally) haven't seen an alloy spare tire that you don't get. It's usually just some steel wheel (we usually call it a spare donut for some reason). I would assume it's just because the spare tire is a "temporary" solution if you actually do get a flat tire and it's going to be a cheap fix-it.