One of our clients is in the MVP phase of a health/performance related product that will be unique and made separately for each customer.
One of the issues is whether or not a potential customer is willing to go through the steps (taking 4 specific pictures and uploading them) needed to allow the company to produce the product.
As part of our research we came across a blog that had compiled a lot of interesting statistics, which unfortunately did not answer our questions.
Update June 18, 2019
https://www.evenkeelinsoles.com/ is now creating for and shipping product to customers nationally.