Exchange the iPhone 4GB

Question

Why exchange only the iPhones 4GB for an iPhone 8GB bought in a certain period of time and not ALL the iPhones 4GB disregarding the period they were bought? Why should I be penalized for having bought the iPhone 4GB in the first days it was released?

Answer 1

Being 'penalized' is a bizarre concept. The device you have right this moment is exactly the same one you bought. It does the same things it did when it was new, works the same way it did when it was new, provides the same functions and resources it did when it was new, and continues to be supported in exactly the same way as it was before. In what way is your iPhone anything less than it was when you decided it was worth buying at the price being asked for it?
Why exchange only the iPhones 4GB for an iPhone 8GB bought in a certain period of time and not ALL the iPhones 4GB disregarding the period they were bought?
That doesn't actually make sense, so despite the use of the question mark it's not easy to answer. However, if you're saying what it appears you are, you clearly misunderstand what's happening. No 4Gb iPhones are being exchanged for 8Gb ones, regardless of when they were bought. 4Gb models continue to be sold - with the same $200 price cut as the 8Gb model - while remaining stocks last (of which I'd bet there are many). People who bought either model in the last couple of weeks should be able to get the $200 balance refunded, while people who bought longer ago can avail themselves of the $100 store credit when the details have been decided next week. Owners of 4Gb iPhones are being treated exactly the same as owners of 8Gb iPhones. And 4Gb iPhones will continue to be eligible for the same updates and service, support and warranty as 8Gb models.