[Polymarket Signs LeBron James as Spokesperson, Annual Salary Exceeds His NBA Contract] According to Deep Tide TechFlow on September 17, as reported by Front Office Sports, prediction market platform Polymarket has signed an endorsement deal with NBA star LeBron James, paying $15 million annually. Notably, the agreement focuses on promoting soccer rather than basketball, and the income James receives from Polymarket each year will surpass his current NBA contract salary.