Which athlete's endorsement deal included unprecedented 'equity' compensation that eventually earned them over $1 billion, revolutionizing how athletes structure their brand partnerships?

Product endorsements are the lifeblood of sports marketing, creating billions in revenue annually. Athletes can dramatically increase a product's market reach, while brands gain instant credibility through association with sports stars. This trivia question explores a fascinating aspect of the economics behind major athletic endorsement deals that transformed both the sporting and retail landscapes.

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Michael Jordan with Nike (Air Jordan)
LeBron James with Beats Electronics
Serena Williams with Nike
Tiger Woods with Gatorade