Kuba ukusweleka kokubumba okuhlukeneyo kufakwe kumacandelo amaninzi, kwaye itekhnoloji yokuvelisa yobuchwephesha bafa ikwenzile notshintsho oluthile kule minyaka, kule nxalenye, imithetho yoyilo ngokubanzi yokufakelwa kwamachaphaza e-blist iyashwankathelwa.