They used to be called yellow dog contracts and are common for on-air talent in broadcasting/cable. Usually there's a specified time that you can't take a job that would compete with your former employer. At minimum it would amount to the remainder of his contract years. I assume if he had a new employer make it worth his while plus the payout amount, he could get around this. I wonder if that includes being self employed or syndication? I'm sure that would apply as well. Bongino is no longer under contract so that wouldn't apply to him.