This is something I remember doing briefly in maybe the late 2000s (maybe 2008 or 2009) where you flew virtually as a passenger. It sounds rather absurd to describe but you basically booked yourself on one flight and then when it landed (after a real amount of time in the air for that journey) you were eligible to book yourself on another flight, again virtually. I seem to remember there being rankings based on your location/country etc. It was all done on made up airlines.
I've tried doing a Google search but cannot find anything, and can't see anything on my email either.