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I am a huge fan of basketball and the National Basketball Association (NBA).  I also visit their online store often and I believe they do a good job in marketing it.

They update their products frequently and offer lots of coupons and promotions weekly.  Anyone who is a fan can go to their online store and be satisfied with their service due to their discounts and fast shipping.  Once you get an account with them, they ask you to specify who your favorite teams and players are and they send you promotions accordingly.  This way, you are always updated about new merchandise and promotions for your favorite teams and players.

This makes people like me go back to their store over and over again to purchase their products.  This basically makes me believe they are doing something right with their marketing