"The app and its website both play the mystery card. No mention of who made it and where it came from, but I found this Mashable piece that provides a bit more background."

This seemed bizarre to me, so I went looking. There's like half a dozen places on the website with background:

It's in the FAQ: http://www.atebits.com/support/faq/what-is-atebits/

The News page: http://www.atebits.com/news/ ("atebits 2.0 October 15, 2012 In 2007 I left Apple...")

The Contact page: http://www.atebits.com/contact/ ("Follow us on Twitter at @atebits and @lorenb.")

The Press Kit: http://www.atebits.com/contact/press/atebits-presskit.zip (Contains an about.txt that's exactly what it says.)

All of these are one or two clicks away (except the press kit, which is 3). Loren's not exactly bragging about his background on the front page, but if you're going to say he's secret and mysterious, at least take the time out of your day click a link or two.