You will not make money with most of the drop shipping companies, however, you will make money with the real wholesale suppliers who are willing to drop ship for you!
This is what a lot of people do not undestand. A lot of people who advertise online are not the real drop shippers. In most cases, these people are middle man. Here is a good article
you should read about Drop Shipping.
Drop shipping works! The only thing is, you need to find the real wholesale drop shipping company, to be able to make money with it!