Well that is also a good point. I just think that if the quality of the product you sell is high, coupled with a great service delivery and marketing, then there will be an influx of sales.You are on point but don't you think customers come back to patronize you as well as do referrals not neccesssary due to the quality of the product. They can get the same product else where in most cases at lesser price. The reason for advertising is to increase customer base, to retain the customers and get more referrals is through good service delivery.