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.
And the best part is, that there is no monthly plan and you're forced to pay the $8.163.10 annual fee all up front.
And by paying these supposedly-monthly fees early in a lump sum, you are effectively spending about $320 more than if you paid $680.26 per month. But if you're willing to lay down more than $8K just to value domains, who cares about burning a few hundred dollars more?