> When a physical object that has to be manufactured and shipped costs more than a text file, I feel ripped off
But this is highly irrational.
If the physical book is a better deal for you, then go for it. If the eBook deal is better, then go for that. If you still decided that the eBook deal is better than I can't fathom how it can be a 'rip off' because another deal that you turned down is cheaper. What effort went into making the product is entirely irrelevant. All that matters is the price and value to you.