yeah... I'm looking forward to finding out as well....
Master keying i get, with additional true gates but I've been trying to imagine additional or perhaps split side bars to make the control function happen!!???
Its almost worth dropping 100 bucks on one from Ssnobs to find out

Website says a Special Control key is needed.... so maybe they just degrade the whole lock to a lower disc count and then have a split side bar and then have inner radii cuts only on the operating key?