This is a cool concept. Great if you plan plan on making a single cable and really trust their QC as well as your own skills not to make a mistake.
However, paying $9 for less than $3 worth of materials is a big no-go for me. I'd rather order $20 worth of materials myself and have enough to make multiple cables in case mistakes are made or for future builds.
Still, I can see this fitting someone's needs perfect.
KamakaYeah, I'm the same way, but I suspect we're in the minority. Certainly my wife doesn't understand why I would want to have the materials to make ~100m of custom USB cables :)
DaedLol. Oddly enough my wife gets it. She actually ends up using my paracord and the occasional tool. It's helpful in justifying later purchases.
It helps that I make cables for all my other hobbies and for her needs too.