Jared Fogle for Subway

Jared Fogle's endorsement of Subway for 15 years turned a personal weight-loss narrative into the chain's most powerful marketing asset, generating an estimated $100 million in revenue. That foundation crumbled immediately after his 2015 conviction for sex crimes involving minors, forcing Subway to erase every trace of his connection. This endorsement failure outstrips #10 Lindsay Lohan for Lawyer.com in sheer monetary damage, as Subway lost a decade-long investment rather than a single campaign.