Sales psychology 1 - Start pricing extremely low, and word travels fast 2 - Temporary pricing causes buyers to act quickly, with less consideration 3 - Buyer

Sales psychology 1 - Start pricing extremely low, and word travels fast 2 - Temporary pricing causes buyers to act quickly, with less consideration 3 - Buyers who wavered in their decision making panic and pay more than they originally would have in order to not miss out. 4 - Designer knows what is left is both over priced and no one really wants. With static pricing, #1 doesn't happen, #2 doesn't happen, #3 doesn't happen, #4 does, albeit much more slowly. #1 is a core piece of both Google & Facebook's sales psychology. You can see them move the sliders from totally free, to really good deal, to your fucked without paying us lots of money as they launch ad channels.