The golden rule of Costco membership has always been simple: Grab a hot dog, a beloved snack, and enjoy the savings. But in May 2026, that unspoken contract between the retail giant and its loyal fans is officially under fire. A viral TikTok storm has exposed a shocking menu swap that has health-conscious shoppers erupting in a mix of fury and disbelief. The legendary calzone is disappearing, replaced by a five-piece chicken tender order that carries a terrifying caloric price tag.