Is Facebook starting to fade?

Aaron Sorkin now has something he can write about for “The Social Network: Part Two,” if he’s feeling up to it.

Thanks to a significant drop in usage by Americans and Canadians, Facebook has begun to hit a bit of a rough patch.

While it’s true that the website is closing in on its 700 millionth member, it’s looking less and less likely that person will be from either the U.S. or Canada.