That was in the days before internet and flyertalk. Booked via teletext and phone.
Just after hoover offered flights to USA if you bought a vacuum cleaner.
the nice(?) lady who sold me the endowment policy that was supposed to pay of our mortgage and give us a lovely 22k bonus, gave us some booklets for 15% off at Ponderosa I Drive

Loved the good old days when everyone could just lie.