I do not see the point of paying for porn when it can be viewed for free. I think such projects will not be a huge success and not bring a permanent profit.
Adult business is trying to adapt new technologies. In the history many times "porn" defined many technologies (like VHS`s beating Betamax) but on Blockchain, porn is late.. and although there are many ideas and projects many seem to fail in many ways but it`s very normal in this period of time. The progress will come in this way and it`s already having its pace indeed.
People are paying for porn. Still. There`s a big economy and it will grow in the next years if it adopt the technology (like in VR and or in other areas)