My blog is worth?

My site is worth $71,579,097.How much is yours worth?

You've see them everwhere. These little "how much is your blog worth" banners showing an exact figure, but I think my blog is worth ZERO. But it seems like website calculator thinks it's worth just a little bit more. Go ahead, enter this blog in the little box on their website and you'll see. After you do that, let me know what you think! :)
I know why it's valued that high (71+ million USD) but it flucuates rather sharply but what's a few million dollars? Do you know why it's valued that high?