HDS hija ffinanzjata mis-Servizz Postali u titmexxa kull sena minn Chilton Research Services, ditta ta’ riċerka tas-suq li tinsab f’Radnor, Pennsylvania.
Chilton Research Services, kumpanija ta 'riċerka tas-suq ibbażata f'Pennsylvania, tospita HDS kull sena.