Well, the simple answer is if you don't have your own product you're going to have a hard time selling anything, online or offline. There's so much raw promotion power that comes with having your own products. Look at it this way, without them, you can't joint venture, you can't have an army of affiliates promoting for you, you can't control the sales process and gain new knowledge through your research, you can't build up your resources for future promotion, in fact, there isn't much good to come out of not having your own product.
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