The company I used to work for had a policy that if you had a business need, and one of the four executive jets was flying that way - you could ride on the jet.
I've flown from Dallas to Louisville and/ or reverse several times on the jet rather than commercial. It was nice because I got to ride jump seat in the Challenger or Gulfstream most times. Though a couple times a planned 1800 departure turned into a 2200 departure - because the plane went when the division president or CEO was ready. Not the 'as available' passengers.
I've been able to leave home about an hour early, get to KADS, get on the jet, get to the office of the rest of my team about 9 am - do a full day productive work with my team, go back to KSDF and fly back to KADS - and be home about an hour later than normal. Did that several times.
During my 20 years in the US Navy I flew Space A several times, but more often got to fly with a squadron or sister squadron aircraft which didn't meet MAC requirements - like a C-2 or a P-3. Got a lot of flights on P-3s, even a few on jets like A-3 or S-3.
@ PawPaw's house - near KADS, Addison, Texas, USA