I looked at some of the gerbers, and to be honest they don't look bad. I don't see any major, obvious issues, they look to have been designed by someone with a clue. My guess is they spend ~$10,000-30,000 getting the design done by an actual engineer, then probably realised they'd need a few more spins and a lot more software to make it go, plus the cost of the components will have been way more than they had anticipated.
I don't see anything in the BOM for lower voltage buck converters so assume all the magic happened on that add on card. I wonder how much that cost?