I have not seen or ran into any major issues. Once you understand, they are providing you a list of sites and contact info in what ever niche you choose. You have to manually reach out to these sites via email which they provide, or you can pay them to streamline the process. I look at this as a double opportunity. You can pay for back links and once your site is good, add your domain and info to their register. Hopefully wonderlinks stays around and adds more features.