Which breakfast cereal first used the marketing campaign strategy of mailing free samples directly to consumers' homes, pioneering direct-to-consumer sampling in the food industry?

In the competitive world of breakfast cereals, marketing campaigns can make or break a product. One particular cereal brand launched a revolutionary campaign in the 1980s that transformed not just how their product was perceived, but fundamentally changed breakfast marketing forever. This campaign created one of the most recognizable mascots in food advertising history and helped the brand capture significant market share in a saturated category.

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Kellogg's Corn Flakes (1906 campaign)
General Mills' Cheerios (1945 campaign)
Post's Grape-Nuts (1932 campaign)
Quaker's Cap'n Crunch (1963 campaign)