I mean you're right, but as someone said everybody has a limit, it's not about how much money you got, seeing the woman your wife in whom you invested time, money, and feelings getting stuffed by a man "for free" will kinda hurt. At least he is clearly handling the situation like someone who is hurt but tries to downplay it. Cuck fetish is a thing but he clearly doesn't act like he has it.
If he wasn't hurt he would just don't care, so he either doesn't love her as a wife or their marriage is just for profit, at least that's what I think.
At least he's making money out of it, with the podcasts, the videos, ...