Man appeals to that which is considered in the

Old days as vice. Man makes money off other men's base instincts , such as gambling ,prostitution, war, thievery,child porn and molestation,  

 I wrote a post here listing what I call crimes of the dick.  Not all men are guilty of all or even some of the crimes listed but if you think about it. Pretty much all comes close. This is what rules the world.
Masturbation is called the happy pull inCambodia
What does that tell you!
So the only way man makes big money is off mans big vices.  I would say war is pretty big..