Which technology-driven metric first allowed sports brands to include 'social media engagement rates' as a contractual component in major athlete endorsement deals?

In the competitive world of sports merchandising, athlete endorsements have evolved dramatically with technology. This poll tests your knowledge about a pivotal moment when digital analytics transformed how sports brands evaluate and structure endorsement deals. Do you know which technological advancement revolutionized how athletic performance metrics factor into contract negotiations?

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Nike's 2014 Digital Engagement Score system
Adidas' 2016 Fan Influence Tracker
Under Armour's 2015 Connected Athlete Platform
Puma's 2017 Social Performance Index