(I'm the author)
I don't think it's a contradiction at all. Email is used for a lot of things. Facebook has replaced one use of email. Their next move will be to try and replace all the other uses, by making Facebook into a more "serious" platform.
I don't think it's a contradiction at all. Email is used for a lot of things. Facebook has replaced one use of email. Their next move will be to try and replace all the other uses, by making Facebook into a more "serious" platform.
Businesses are more likely to totally block facebook rather than allow their important and legally binding email communications be run through an American social networking company.