It was a comment from a KentOnline reader that raised eyebrows last month. They claimed they had been informed by someone living at Shoreline Crescent, a multi-million-pound block of luxury flats right on the beach in Folkestone, that only two of the homes there had been sold. Surely this couldn’t be true. If it was, what would it mean for the rest of the seafront masterplan produced by Sir Roger De Haan’s development company? Up until now, bosses have remained tight-lipped about the number of sales. But last week they invited KentOnline to visit the eye-catching tower block and opened up abou…