Photos trending across
the platform right now...
Have you considered reaching out to this or similar companies?
It is certainly very good at finding them but the biggest problem is in the policing of them. Pixsy have their own legal teams to follow things up for you but in every case I have attempted to deal with they have been unable to proceed for a variety of reasons.
Usually it is because the website owner cannot be traced or they are outside the legal jurisdiction of Pixsy.
I get the membership free with the Guild of Photographers and it is interesting to keep an eye on things but ultimately not much use. I wouldn't pay for it.
I would be interested to see what Clickasnap's proposal is for this.