I never read anything that talked about this as part of the problem. It was always "We didn't expect them to use it so much."
That's an awful lot of strangers to make transatlantic flights with at 200 bucks a pop, and it would take quite a long time to recoup the multi-hundred-thousand dollar investment in the companion ticket. Hardly seems worth the time for somebody who can afford half a million for a couple of lifetime passes.