See the last sentence in my comment. I was attempting to address two points:

1) the designs highlighted on their page do not take advantage of the reasons why 3D printing might be chosen for this application (designs which cannot be manufactured using any other technique). In the examples provided, all could be injection molded _for example_. 2) it would seem that there are cheaper ways to get the customized designs they are building and offering customers by using a reduction process without sacrificing any of the customizability or time to market.