The spreader effect refers to the fact that members of a loyalty program are more likely to try related products offered by the marketer. For example, an American Airlines AAdvantage member who also joins the company’s Admiral’s Club airport lounge creates additional revenue for the airline, as a does the member’s purchase of a family vacation through American’s Vacation services.
The spreader effect becomes even more pronounced when a cross-promotion is added to the mix. Earlier we mentioned Lone Star Park might team with American to offer a trip package to the Kentucky Derby. Another example is Citibank offering you AAdvantage miles if you get a Citibank Visa card through American’s AAdvantage program. Cross-promotions such as these encourage loyalty program members to try even more products from more producers.