Did all of the above recently. They go after buyers of simliar products. In other words, most successful mail order companies don't create a product and try to find people to buy it. They find people who WANT to buy something. Then, they create something to sell them.
Most Internet marketers have the process backwards.
Creating a product and then trying to find people to buy it is the HARD way. Finding people who are ready to buy and then selling them what they want is the EASY way. You may be able to make money the HARD way, but why should you when you could be making so much more money the EASY way. Too many people have jumped on the Internet bandwagon and have led us to believe that anything goes online. Well, I have news for you.