Why has Big Bang been dominating the charts?

Why has Big Bang been dominating the charts? Chosun Weekly recently wrote an in depth article on the group's recent success. 2 years and 3 months were only numbers, because when Big Bang finally released their comeback mini-album, "Tonight", not only did it skyrocket to the top position on live music charts, but also sold 100,000 copies in a week, a truly remarkable feat in this era of 2 to 3 week promotion cycles. They also made a specially-tailored comeback to broadcasting programs with "The Big Bang Show", thanks to SBS. The Big Bang frenzy isn't just limited to the Korean peninsula, however.