In 2021, Kargo, the US adtech firm led by Harry Kargman, wrote a €55 million cheque for the Waterford company StitcherAds. Five years later, it is cheques unwritten that are casting a shadow as the US company and a handful of shareholders lock horns over earn-outs and the financial performance of the business. Four StitcherAds shareholders launched arbitration proceedings in Ireland against Kargo alleging they have not been paid the money they are owed. The four individuals, spread across the US, UK and Ireland, were senior employees or board members at StitcherAds and shareholders in Betapond Limited, the company behind…