Twitter may let you ‘buy’ more followers

Big scoop from All Things Digital ’s Peter Kafka. It seems Twitter is kicking around a feature that will enable users to promote their accounts, which would theoretically bump up their follower count. Kafka referred to off-handedly as a “Promoted Tweeter” product. How would Twitter charge for this product? “Some obvious possibilities: Twitter could charge users based on the number of followers they acquired, or simply based on the exposure their Twitter accounts received,&#82…