I'm amused to see that someone is trying to sell this. The code has been around for a while, but I don't really see the audience.

Redhat, Novell, etc., aren't going to support this. Not as long as they aren't the ones providing the patches. So larger corporations aren't going to want to purchase this.

If you have a server that absolutely cannot be rebooted, that probably means it's serving a significant amount of traffic 24/7. Of course, most shops like this probably have redundant servers... so rebooting is not, in fact, a problem.

Maybe servers that are taking real-time measurements? And connected to the internet?