theres no such thing as selling yr soul. In the 50-90s it meant selling your music, and that you dont have any rights to yr music. They control yr art.
Selling your soul is a very misunderstood topic.
People foolishly believe the devil rises with a contract written in blood and your soul is gone. That's not what that means.
Selling your soul means selling your humanity and falling to depravity through the acts commanded to you by higher ups, with the condition that you get what you want if you do that.
The reason why they want people to do that varies in reason:
1. Some are literal Satanists who want people to go to hell.
2. Some are deviants and want people to perform acts with them. (ex. Homosexual acts)
3. Some are sadistic and want to see people suffer.
4. Others love controlling people and making them their slave.
So selling your soul basically means you'll do shit that you wouldn't want to do because it'll give you a paycheck. And I mean shit that you're disgusted by and fucking hate.