This article discusses software internally used by Apple.
Acquiring a copy without Apple's consent is illegal and may result in being scammed.
Installer was found on the "Smart Sign" iPads inside Apple Stores. One would login with AppleConnect credentials to use. It was a web application used to install Smart Sign. Smart Sign is discontinued, however its infrastructure was re-purposed and is now used to distribute other apps, such as Pricing.
Add Installer to Home Screen (Click Bookmarks, then Click Add to Home Screen)
Note: link no longer works.