I've been running Ubuntu on my machines for something like a decade now, and have experience with Debian and Red Hat/Fedora from before that. I know what to expect from these distributions. When you tell me you've rolled your own distribution, I have no idea what to expect, which turns me off from your product. And if the answer is "you can expect exactly the same as what you'd get from Ubuntu/Debian/Fedora/whatever," then why bother rolling a new distro in the first place? Why take what should be a simple sales pitch and make it more confusing?
They seem to think the idea of learning my way around Yet Another Linux Distribution is an enticement. It isn't -- especially when the only community around the distribution is a single small company, which means that anything I do learn is unlikely to be useful beyond using that company's products. As soon as I buy from someone else, or that one small company goes out of business or loses interest in maintaining the distro, I can take all that knowledge and toss it in the bin. No thanks.
(Weirdly, the only company in this space that seems to really get this is Dell. I feel like I'm living in the Mirror Universe.)