At a recent church function I attended, some of the members were selling food as a means to raise funds to go on a mission to China. They were selling lunch and it gave me an interesting but very real analogy to explain why the "buy from yourself" method as taught by upline is just ridiculous if that is your primary means of moving products from your business to the end consumer.
At my church, these folks were selling chili dogs for $5. It probably costed about $2 to buy and prepare these chili dogs, thus each sale netted the mission group about $3. But to make a point, how much profit would be made towards the mission if only the missionaries bought chili dogs? Simple, their profit would be $3 times the number of chil dogs sold. But there is no true profit as the money is still coming out of the pockets of the missionaries.
You could argue that it is still profit, but from a business standpoint, it is not a true profit. If I owned a retaurant and dined in my own restaurant, it doesn't increase my sales, nor does it increase my profit.
Buying everything from the Amway catalog (Or Amway partner stores) for yourself does nothing to increase your profit or sales. It makes you a customer. Any rebate you receive from buying your own goods, still comes out of your own pocket.
Now if you bought nothing but sold some Amway goods to people, you realize a true profit from a business perspective.
There is nothing wrong with buying what you truly need through your own distributorship, but if your upline is teaching you to buy from yourself without selling goods to non IBOs, you are being taught some poor business practices.
It is my guess that some upline leaders teach the buy from yourself method because YOUR loyalty and dedication to 100 PV brings stability to their business. Stop and digest this for a minute.