Yes, we can say it is simply a way of life in highly competitive industries. Because the basic goal of a producer is to get their products to the consumers and retailers are the best instrument for that, which makes the shelve slots in a retailing business very powerful. Hence, providing in such a way makes it easier for new products to get in the stores. If a store can be convinced to stock an item via a payment of a fee. It can also keep the product in the store long enough to gain a foothold.