Dan Ariely wrote about the power of the free:
The results indicate that the power of “free” is surprisingly influential. When we face a decision about a tattoo, one would hope that the long term permanency of the decision, coupled with the risks of getting different types of infections would cause people to pay little attention to price, and certainly not to be swayed one way or another by the power of free. But sadly, the reality (at list in the nightclub scene in New York) suggests that the power of free can get us to make many foolish decisions. (source)
So, for one, the free makes you do things you wouldn’t normally do. But, after you get something which has some value to you for free, you may also get another feeling – grateful, thankful, obliged even. I want to talk about this matter.
