You have to enforce a copyright, or any other license, contract, or TOS.
It's up to you (and a lawyer) to decide if & how to attempt to enforce it. Either way, it's going to cost you money, though going to court may enable you to recover these funds. DMCA may be another approach you can consider. Many times a letter from a lawyer is enough, although if they are not having any success, why bother?
It's up to you (and a lawyer) to decide if & how to attempt to enforce it. Either way, it's going to cost you money, though going to court may enable you to recover these funds. DMCA may be another approach you can consider. Many times a letter from a lawyer is enough, although if they are not having any success, why bother?