Which revolutionary retail innovation did Singapore Airlines introduce in 1989 that transformed how transportation companies build brand loyalty?

The transportation industry, particularly aviation, has a fascinating history of developing unique retail strategies to build brand loyalty. From the glamorous days of the 1960s to today's digital marketplace, airlines have pioneered innovative approaches to create loyal customers through exclusive products and experiences. Test your knowledge about how transportation companies have influenced retail and brand loyalty strategies over the decades!

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KrisShop, the world's first sky-high retail catalog allowing pre-order of duty-free items before flights
SkyMiles Marketplace, the first frequent flyer program that allowed passengers to purchase products with accumulated miles
AirMall, the first digital shopping platform accessible through seatback entertainment systems
TravelPass, the industry's first subscription-based model for purchasing airline amenities and upgrades