If we go by trying to target areas with large Internet using populations, here's the top 25.
1 China 988,990,000
2 India 780,090,876
3 USA 312,320,000
4 Indonesia 212,354,070
5 Brazil 160,010,801
6 Nigeria 136,203,231
7 Russia 124,000,000
8 Pakistan 118,800,000
9 Bangladesh 117,238,000
10 Japan 116,350,000
11 Mexico 89,000,000
12 Iran 78,086,663
13 Germany 77,794,405
14 Philippines 73,003,313
15 Vietnam 68,172,134
16 UK 65,001,016
17 Turkey 62,075,879
18 France 58,038,536
19 Egypt 54,740,141
20 Italy 50,540,000
21 Korea 49,421,084
22 Spain 42,400,756
23 Thailand 36,513,941
24 Poland 34,697,848
25 Canada 33,950,632
#1 is defunct, Hololive EN covers #3, 16, and 25, Hololive ID covers #4, and Hololive JP covers #10.
The biggest markets left would be India, Brazil, & Russia.
