1st, He ALREADY cashed in. She basically made his career. He wouldn't host AGT & wouldn't be on Real Husbands of Hollywood if it wasn't for his marriage to her. And probably wouldn't chair his own network either. I mean he was D list before their marriage.
Plus. he wouldn't write anything trashy about her without hurting his own brand. You don't become controversial and keep jobs like AGT....
If people in the biz think you talk too much, nobody would wanna work with you.