Which innovative campaign tool, first deployed at scale during Barack Obama's 2008 presidential run, revolutionized political fundraising by enabling small-dollar donations and became a model for future campaigns?

The intersection of product innovation and politics has revolutionized how campaigns operate and engage with voters. Modern political campaigns now function like sophisticated marketing operations, employing cutting-edge technologies and strategies once exclusive to retail and tech sectors. This trivia question explores a groundbreaking product innovation that fundamentally changed how political campaigns operate in the digital age.

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ActBlue's online donation platform
Cambridge Analytica's voter targeting algorithm
Facebook's political ad marketplace
NationBuilder's campaign management software