Another service? <a href=" http://www.cityprintingltd.co.uk/cymbalta-uk.pdf ">cymbalta cost uk</a> Costolo - who had sold Feedburner, an advertising-based blogpublishing service he founded, to Google for $100 million - hadno such doubts. By his second month on the job, he had helpedpersuade Williams to green-light engineering positions to buildTwitter's first ad unit, which would become the "promoted tweet"- the cornerstone of Twitter's business today.