I don't understand why you think Apple should abrogate their duty to their stockholders (and employees) by giving away something they don't seem to need to give away.
So long as enough folks are willing to pony up the extra money for the upgrades, and for so long as Apple is selling as many units as they wish, they'd be be stupid to not NOT maximize revenue...
Because Apple has NEVER done it before ? And good press is good press. The cost of double the storage between 128 and 256 isn’t much to begin with