Amazon's advertising revenue is booming, with a 22% growth in Q4, driven by strong performance in both retail media and Prime Video ads. However, the company's massive investment in AI raises questions about the long-term returns on these expenditures and the sustainability of its growth amidst market skepticism.

Meta Platforms' shares jumped 11% after the company forecasted third-quarter revenue exceeding analysts' expectations, driven by advancements in artificial intelligence for its advertising business. Despite rising capital expenditures and scrutiny over its aggressive AI spending, investor confidence remains bolstered by the company's commitment to AI development.