Or, probably more like, when the head of the clan (or whomever was in charge of this particular pirating) found out, the ship was released. I don't think the guys who do the actual hijacking are in charge of the negotiating.
Somali pirates have released the hijacked general cargo ship Almezaan – for free – African sources reported today. Fairplay was unable to confirm the reports with the ship’s owner, Biyat International.
Almezaan had been en route to Mogadishu, Somalia’s capital, when it was seized 100km off Somalia on 2 May. It was carrying used cars, flour and sugar. The vessel was reportedly released for free and without conditions when the pirates learned that it was on charter to traders in Mogadishu who demanded its release.