Yeah, people always do it from time to time because it is a strategy that always works and has been working for a very long time. During festive seasons you can also give free gifts for your customers because that will go a long way in showing them that you appreciate their patronage.Okay I understand the strategy you are talking about, over here there are some supermarket that if you can buy up to 10,000 naira worth of product, you'll be given 100 naira worth of free stuff , it could be anything . I now understand.