It's an I'll conceived plan, let me explain why...
GoDaddy has the lions share of aftermarket sales and anyone looking to buy a domain is going to have to look at numerous domains before they find on to meet their needs. As it comes down to t eh top five or so the potential buyer cannot look at the valuation at GoDaddy without being cut off.
It's only a question of time until a free service takes that appraisal market away from Godaddy.
Even services like Estibot, Saw etc will lose out to a free ad supported model.