Coke Tweet Machine was not just another pay per tweet machine. This machine asked for no #Hashtag and no mention of the brand. And if they were used, they did not count either way. It was not an ad.

All you had to do was tweet, retweet and get retweeted back positively. If you did that, you were given a discount for each tweet. Otherwise, well... you had to pay a bit more.

In one month the Coke Tweet Machine:

Followed 880 people

It inspired 27.000 positive tweets

Achieved more than 25 million optimistic impressions

And increased positive feeling over a 23% on twitter.