Several months ago, I purchased a curling brush at Wal-Mart. When I got it home, I found that the labeling had a statement to the effect that the product was specially made for Wal-Mart, and that if I had bought it anywhere else, I should report it to Wal-Mart (or something along those lines).

If Wal-Mart is limiting its product selection to only those items produced specifically for its stores, would this approach be a push method or a pull method of promotion? What effect might this have on overall sales?