Imo that's backwards. Who cares. The backers backed it because they believed in the vision, and now it's been realized, so it's done.

It'd be like getting mad that I bought a game full-price and then some time later it goes on sale.

Edit: I'd also like to add that they'd probably get even more sales if they put more of a discount on their games more often. Allow the super-budget gamers a chance to actually pay for your game you know?