It's awesome that they offer these wheels!
It doesn't cost them anything to offer them, and it gives people who want to autocross a wheel spec above 16" they can follow. Not that many people will autocross the current gen Corolla.
Also, offering these wheels means someone's going to buy them, and eventually they'll get on to the used market, making it easier for people with BRZ's an FR-S and other 5x100 Toyota/Subaru's to get their hands on quality 18" metal.
*Sold* 06' Vibe Base - Mono Platinum - Manual
Turo'ing 15' BMW 328i Sport - Jet Black - Auto
Daily 19' Toyota Camry SE Hybrid - Galactic Aqua Mica - eCVT