Here's what you need to know for today in the business of podcasting:  March Madness men's games all but sold out of ad inventory, how third-party cookie deprecation will change ad buys, teens use YoUTube on a daily basis more than TikTok, how advertisers are reacting to TikTok's shaky future, and Amazon's opportunity in the cookie-free future. 

Find links to everything discussed and the full write-up right here on Sounds Profitable.