Certainly not fortune, but fame, adoration, good living, future without actual work. Rich husband, influencer career, etc. Drug addicts dont last in porn.
https://www.rollingstone.com/culture/culture-features/porn-s...
The producers know. And swap them out. As long there is somebody else, who can be abused by the same promises.
Did you read TFA that goes in explicit details of the amount of actual work involved in porn?
If you have lots of money, you can have sex with pornstars for money.