Flutterby™! : Follower Factory

I don't think I've linked this one yet: New York Times: The Follower Factory, about buying follows on FaceTwitSpace and such.

While they talk about how buying followers is essentially buying credibility for product endorsement and advertising, they don't talk about how much of this becomes fraud in the ad sales. Because it seems to me that advertisers might want to know that they just paid for impressions to 20k 'bots...