Demo This.

                                    Demo This.

A "demo" of a product, by its very definition, is something that demonstrates how a product or process works. But the word can be used as a lure to promote a company or its full-line of products, without any "demonstration" of how their "unique method" works. 
I fell for this lure when I decided to brush up on my "school" Spanish. I called a well-advertised product's number for a "free demo CD". 
After a few penetrating questions, I was able to get the salesperson to admit the CD wasn't going to show me a sample of how I would be learning the language, but a sales pitch about all the languages they sell. The call was designed  as a marketing tool to get information about potential customers who would land on lists for mailings and possible phone calls. 
I ended the phone call.