SponsoredTweets utilizes a third party to validate and score the click steam data of every tweet. Clicks from bots, spiders, click farms and other automated or fraudulent sources are invalidated. Advertisers do not pay for invalid clicks and Tweeters do not earn for invalid clicks.
Bit.ly is Showing Higher Numbers
You should expect click counts from bit.ly and other simple tracking tools to be higher. That is because these tools do not filter traffic in same way and include many forms of human and non-human traffic. Our responsibility is to deliver high quality, human traffic to our advertisers. We continually look at click data to see if the scoring is properly working and make adjustments to balance the needs of tweeters and advertisers.