Driving Thru

This small pass-through town that I live in holds little to excite. The main drag (which is really all there is besides the side streets of houses and neighborhoods) is lined with gas stations, liquor stores/bars, car related businesses, and churches. There is, however, a Dairy Queen. A couple years back it burned and the old was replaced with a nice and shiny building. During the summer months the parking lot is frequently full, but the winter months are, unsurprisingly, harder on the ice cream business. To entice passing drivers the DQ sign offers deals on Dilly Bars throughout the cold months. The vacillating numbers I've noticed over the last couple months are: buy 6 dilly bars get 10 free; buy 6 dilly bars get 6 free; buy 6 dilly bars get 10 free; and this weeks deal, buy 6 dilly bars get 4 free. Why would someone who actually pays attention want to get 10 dilly bars for the price of 6 when in a couple weeks he'll be able to buy 16 for the price of 6? Honestly, I wonder if people actually take advantage, or if we've all become so accustomed to the words on the sign that we ignore the sign altogether. Maybe the management should switch up the option a little more.