Look at it this way. Whores at places like the Bunny Ranch have to fuck guys ten times worse than Howard for a fraction of the money and perks that Beth gets.
If I was a woman and I wanted to whore myself out to a guy or guys to make money and have a better lifestyle, I would go the Beth route over other whorey routes. I mean Howard seem to let her have a separate life from him and she gets to use his money, fame, and connections to hang out with younger guys at all the hip spots in NYC and the Hamptons without Howard.
Beth is definitely whoring the right way (assuming you are ok with whoring). She could have had gone to the Bunny Ranch and been forced to fuck Eric the "Actor" so the Bunny Ranch could get plugs on the Stern Show.