I think They Usually accept bitcoin in porn sites if you visit the dark web. Many sites there uses bitcoin as there main payment no other method to see other than bitcoin. If major porn site accepts like YouPorn, XVideos then its a good news for other users like us to access premium the easy way without putting our credit card informations.
This is good for their subscribers as they do not need to risk their names when getting the service of porn business, bitcoin is anonymous and they can hide their real identity. Actually there are already a lot of porn sites who are accepting bitcoins and some have successfully run their ICO here.
What are some of these websites?