One of our competitor used it. We could track the campaign because the twitter account ( 18K+ followers ) used bit.ly links. After one week of promotion, the l

One of our competitor used it. We could track the campaign because the twitter account ( 18K+ followers ) used bit.ly links. After one week of promotion, the links had been click 16 times if my memory serve me well... So from that one experience ( I know not that much ) doesn't look to be worth it.