BTS sells 4M+ per album, while having around 1M of online concert ticket sales.
BP sells 1.2M+ per album, while having around 280K of online concert ticket sales.
NCT sells 1M+ per album, while having around 200K of online concert ticket sales.
Twice sells 500K+ per album, while having around 100K of online concert ticket sales.
So it seems like album sales is around 4-5 times of online concert ticket sales.
Album sales is an overestimate of fanbase because fans' bulk buying.
Online concert sales is an underestimate of fanbase because fans can watch the concert it a group with only 1 ticket.
So what is the best estimation of the actual number of fanbase?
Let's say how should we estimate the actual number of BTS' fanbase?
