Yeah when it's their primary career, you take what you can get. Not everyone wants to do that though, and typically the more money the men had, the more elite/desirable they wanted their dom to be. But don't get it twisted, ultimately it's up to the subs and what they want. They (usually) have full control over the money.
And I'm not describing an entire 'business model' here lol. To be clear this was far from the main focus of what I was involved in. And far from the main source of revenue. I'm not giving any more details aside from this.