I think that last bit is more of a 'what you make of it' situation, regardless of how smart or dumb a phone is.
Unfortunately the manufacturers want the data and advertising revenue, and they'd only be persuaded to offer an alternative if they made the same amount of money.
If each sale of a $900 smart phone gives them $100 of ad revenue over a couple years, I'd bet my bottom dollar they would charge $200 for the 'dumb' version.