The reason why these are being giving away rather than sold is because they are all very similar TO EACH OTHER, its just a different way of doing the same thing and they are not reliable.  I refer to them as 3 systems do to the fact that the names are known by many as individual systems, and they have been around for sometime; which you probably already know. Also, it allows you to experience the difference in the type of systems and procedures. They are very simple, but can be useful.

When you purchase any of the systems you will receive three FREE systems that's totally different from the systems being sold. These systems can be used to compare the results with our other systems, but I would rather that you did not use them but only to understand what makes them non-funtional. 

  Nothing of value is really free, they are being offered just a means of getting you here to see the products that are great; and at their selling price and warranties are actally a give away.