Why does a company try to design its product/s closed to other popular products? what type of strategy do they follow?

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Initially consumers loyal to iphone brand will be attracted to buy other products that have some link with iphone, either look or specifications, including parfumes, some office stationery items, etc... in the same time, some consumers who cannot aford to buy desired iphone at this time, after using items looks like iphone most likely to purchase real iphone in the future. Counterfeits communicate the fact that even those who can’t afford to have the real thing still want it. That’s a free ad for the branded product.

 So that, the product closed becomes almost as other popular one and the closed one becomes able to be sold, then, it can be sold to the customers. Then, someday, you will get better idea working on the product.