[crc]

> I just think this point tends to be overlooked when talking about "social" websites, almost like it was not polite to point out where these businesses make their money.

I am not sure that this is overlooked. I think most people know it is as so obviously true that it doesn't need restating anymore.

[toyg]

The way moot promoted "the Twitter way", I find it hard to believe. Twitter's multiple-disjointed-throwaway-identities model is completely useless to advertisers, and as such it will never be adopted by commercial websites on the same scale as the G+/FB model (unless you prescribe it by law).