They run on "stripped down Gentoo" Linux. They have "about 200 employees worldwide". They also get 50% faster throughput than stock Linux systems.
What's all this "no business justification" for having your own quasi-distro? "Business justification" is just intellectual lazines on the part of The Business itself. Or maybe sub rosa "emoluments", like a few rounds of Bikini Golf in the Bahamas for the VPs.