Sheldon Cooper | Lightrocket | Getty ImagesShares of AppLovin tumbled 13% Wednesday as two short-seller reports cast doubt on the integrity of the company's AI-powered AXON advertising software that helped drive the tech giant to become the top-performing tech stock of 2024.Short seller Fuzzy Panda alleged that the AXON model was "the nexus of a House of Cards" built on fraudulent advertising tactics."We believe AppLovin has pulled every trick in the book," the post stated. "We've been told they...