Hi, I'm purchasing a license from a person that looks decently trustable. It's a 1.5 license, and he claims that it is transferrable. I know about Xenforo, but I have no idea what you have to do in terms of owning one. I just have a few questions: 1. What is required to own a Xenforo license? 2. How do I ensure that it's not a scam? 3. Is it possible for him to transfer ownership of the license and then revoke it after I've paid him? 4. What things does he need to do to give me full ownership 5. Are there any restrictions on what I can do with the license since I've bought it from him?