[dustcoin]

The url isn't facebookwww? though, it is facebookcorewww?. The additional 4 characters didn't have to be "core", but the fact that it is an english word and relevant adds significant difficulty to your estimates.

[spacefight]

More that the corewwwi name showed up early and FB chose to pick that one to save more computing power cycles utterly wasted.

[tyho]

I have appended my comment correcting for my mistake.