You may be very excited about starting a membership site and be filled with all kinds of ideas about the type of site(s) you wish to start. Before you jump in with both feet, it is best to do some planning and research ahead of time to ensure your work is put into the right place.
There are, unfortunately, some markets that aren’t as popular as others, and some markets do not have willing buyers. Yes, it is possible to teach the market the importance of buying information, but that can be a very long and slow process.