That article doesn't really say anything at all. He harassed some employee who wouldn't comment, that's all.
As for redundancy, yes, that's a good idea, but there is a lot that can go wrong even if you've planned for redundancy. Have you ever yanked a disk out of your RAID setup during peak load? Why not, don't trust the redundancy? And that's why things break, even if the architecture is designed not to.
Directtrack hosts many affiliate networks, all of them currently down. The official Directtrack twitter account has no info. http://twitter.com/#!/DirectTrack
