That's since they appear in your fans' feeds and get their attention immediately (particularly if they're utilizing Twitter from a mobile phone).
Nke ahụ bụ n'ihi na ha gosipụtara na nri ndị na-eso ụzọ gị ma jide ha ozugbo (karịsịa ma ọ bụrụ na ha na-eji Twitter site na ngwaọrụ mkpanaka).