>>3891388People really underestimate price of living leverage.
Hana has made about $27800 USD so far - even if Nijisanji took a flat 60% after tax, that leaves her anywhere up to $10800.
$9000 is Rp 154.4 mil. A reasonable average monhtly expenditure for 2 (Hana and her husband) is Rp 12.5 mil, leaving 400k Rp surplus. Assuming Hana has no other income (no memberships, sponsorships, and the contract is as bad as this hypothetical), she has still already earned a full year's income through superchats alone over her channel's lifetime. Since she also has these things, it can be assumed she's in the upper third of all Indonesian earners, despite not "blowing up" like JP or EN.
Achieving the same thing, being in the the top 30% grossing of the US or Japan, is dramatically harder.
KR is a bit in-between, people there have money to spend meaning Korean fans are more useful than Indonesian fans, while the price of living is higher, but it's still a good bit lower than the US or Japan.