It will still be big and powerful because there's no global government for the sex trade. Also powerful people will always want to do things covertly to not sully their public imageI know people won't agree with me but shyt like this is why prostitution needs to be legalized and regulated, yes they will still he a black market but not as big and powerful as it is now.
Banning stuff people want just bring in all these demons to provide that stuff by any mean necessary.