Lufthansa would ask its most loyal flyers to pay $8,000 or more for first class while selling the same seat to agency owners for $2,000 ($8,000 less than 75% agency discount). The term was and remains the "AD75" which remains active in the 21st century. Agency owners commonly traded owners' discounts for investment. Rather than spending $50,000 or more a year on airline tickets, we'd pitch a friend to use that same $50,000 to buy a minority interest in our agency. The friend recouped their investment by accessing luxury travel for less. Over 5 years, the initial $50,000 yielded over $200,000 in saving. Using AD75's & travel agency discounts to raise capital, without using hidden city ticketing, we rebranded the airlines term into "Wanna fly first class like an owner?"

More travel agency owner and hidden city ticketing resources:

The Investment Pitch Deeply Discounted First Class Flights

Babson EPS1110, Alpha Kappa Psi & Stephen Spinelli- "We Don't Like Taking Risks" Explained

Airline Fare Rules & Secrets Podcast

Capital Call Babson Didn't Teach-First Class Cheaper Than Coach

The Truth About Premium Cabin Discounts Podcast