The stuff Rogan advertises is so bizarre. It has been a couple of weeks since I listened to him, but the one I can remember best was some sort of payment app that supposedly paid the user to use the app. Then there have been various AM-radio-type "nutritional" products. Maybe mainstream firms don't want to be associated with him, but how do the goofballs he advertises come up with 8 figures every year?
The Cash App is made by Square and they probably pay him a lot. And you'd be surprised how much money pseudo-pharmaceuticals like Alpha Brain can make. They usually put tiny amounts of different compounds (legitimate compounds, but below their effectiveness thresholds) into each capsule. Their marginal cost is very low, and they sell at extreme markup.