Sam Bankman-Fried, the founder of FTX exchange, and Tom Brady, the NFL quarterback, related to promotional work for FTX. Please note that financial agreements and promotional endorsements can change over time, and my information is not up to date beyond that date. Celebrities, including athletes like Tom Brady, often engage in endorsement deals with companies and brands. These deals can involve various forms of compensation, including upfront payments, royalties, or equity in the company. They are typically subject to private contractual arrangements.