So often i hear that BTS is anomaly in kpop. Which i realize now is not true. For example; TVXQ succeeded in Japan at that time such success in Japan wasn't achieved by anyone. Then Bigbang came as digital monsters which is unusual for boygroups because they don't get GP attention not like 1 or 2 hits. Their songs lies; haru haru; bang bang bang are popular among GP.
The difference between previous gen and this gen was social media expansion that led a lot of foreigners into kpop. Shift from Television or offline music listening to online music streaming and online contents.
So why couldn't other 3rd gen bgs reach close to bts levels?
if you look at celebrity culture; popularity is not a linear function. it is exponential function. While unpopular kpop groups do not get paid at all; popular groups earn huge amount in comparison. it's like difference between an entry level employee at Samsung to the CEO. And popularity feeds itself. BTS are now at the level they lose a lot of fans while still gain lot of new fans because their songs youtube will recommend on the top if someone looks for kpop.
BTS are in the same position as top bgs of previous gen; the difference is the market is bigger now compared to earlier gens; bigger market size in the West due to social media. The kpop Western market BTS didn't created it; but they have the biggest market share.