Most of the advertisements I see share a common language.
If a statement is followed by an asterisk*, I assume it's not true. I saw a box of cereal the other day that Reduces Cholesterol* (in conjunction with a healthy diet and exercise) in the same way that eating stacks of A4 printer paper Makes You Rich* (in conjunction with a high-paying job and good financial planning). I'm still jaded by the Unlimited* college meal plan I had two years ago.
Sometimes things are free, but a lot of things advertised as FREE aren't worth having. I can understand free samples, for instance: people try a product and those that like it might buy some. FREE samples, on the other hand, are iffy-- why is the seller so excited that their stuff is free? Free airport wifi is becoming a norm, but FREE airport wifi usually comes at the cost of email address or some other sort of registration.
For the full package of condescending advertisement, I like to see both of these used at once: This Summer at Restaurant, Kids Eat FREE*. What a time to be alive.