^This. Why would law enforcement spend their time trying to identify people paying for access to porn on a TOR marketplace? Unless the porn is CP, or the accounts they are accessing were obtaining illegally like cracknback said, I can see no reason why any LE would pursue them. There's nothing to charge and it would be an enormous amount of effort for something they can't even arrest the person for. As long as the items aren't on the list of DPR's prohibited items (http://silkroad5v7dywlc.onion/index.php?action=kb;area=article;cont=11) it will be allowed to sell on the market.