Merely hearsay but from what I've heard silverknapper has the right idea. Most multi millionaires are so tight they are seduced by the thought of saving a million or so on tax and believe the b.s. they are told by the likes of Garage 9 or sTag or Gamut Aviation about how much money they can make in a penny pinching moribund market and they'd be WAY better off staying private.
Any mainstream EASA is a waste. However, he or she who pays the piper plays the tune so if your millionaire wants to spend a pound to save a penny, let them.