I don’t know much about this specific company/website, but I looked at them just now and to be honest, it’s not sitting well with me. For starters, I couldn’t even figure out what the whole “business model” was based on. And that’s usually the case with Ponzi or pyramid schemes. I suspect its something along the lines of a pyramid scheme where you make money by bringing in other paid members, but I am not sure.
Earning by comments will require you to have your own Blogs and Websites. You will then share these dedicated domains (Owned by You) in the comment window. If an option to add your URL or website is not available, then you do not include links. You contact the site support first and get permission to share your URL. Oh, and NEVER share affiliate links in comments.
Are you a professional in a field that can help answer questions for people looking for your expertise? Websites like JustAnswer and LivePerson match you up with people looking for answers to technical or professional questions. You can make money online by simply answering these questions and providing the right information to people based on their individualistic circumstances.
Your online business should be something that not only makes you money but also brings you happiness as well. If you are not in the least interested in what you’re working on, you may lose steam and end up abandoning your site early on. Return to the lists you made before and remind yourself of what you really like, so that you can make sure to go the distance with your site.