Ok, I will bite... Why would they melt?
I've used "sport edition" wheels for racing before, they are cheap and lightweight... for lightweight low hp cars they are perfect. Last thing I want to do is use an expensive set of rims on the track. I typically beat the shit out of my track wheels.
I am wrapping them in RE-71R's, and they are going to be a dedicated track wheel that gets swapped on at the events
Kind of reminds me of the people who used to caution me that Rota's would crack because they saw it on the internet... at 60$ a pop, they were a perfect track wheel. Beat the shit out of them, scratch them up, don't make you afraid to get close to the corners... what more could you want for a track rim? If you are not running 400hp through your wheels on a 4000lb car, they are fine.
Honestly though, if you have some sort of link that supports your claim that they will melt if tracked please go ahead and post it up.