One of the Chinese sites compiled a list of the number of sales by Touhou series, generally regarded as one of the bigger fan-made game franchise in Japan, and the numbers are pretty surprising:
Embodiment of the Scarlet Devil - 2777
Perfect Cherry Blossom - 1320
Immateral and Missing Power - 588
Imperishable Night - 1303
Phantasmorgria Flower View - 692
Shoot the Bullet - 1223
Mountain of Faith - 2251
Scarlet Weather Rhapsody - 2758
Subterrean Animism - 3928
One of the polls in Japan puts the number of people who has played the series at 14000. It appears the sales number are fairly comprehensive, or at least as comprehensive as anybody could find, so that seems like there is also close to a 80% piracy rate. Somewhere around Mountain of Faith Touhou seem to hit a cult status due to internet videos, as you can see there's a huge drop off between the Scarlet Devil Rhapsody and Mountain of Faith before rising again.
For comparison, the other cult fan game in Japan, Tsukhime, had some unknown number of sales in the dojin era, and then Typemoon went mainstream and Fate/Stay Night and Fate/Hallow Ataraxia both sold 100K+. Capcom also licensed 3 more Fate series game for PSP/PS2 and I assume if Capcom was wiling to license your brand it's probably going to be pretty profitable.
Now I know the maker of Touhou, ZUN, does this as a hobby. But if I was making a game and it sold 588 copies, I'm not even sure if I'd continue making the game. It doesn't really matter that Phantasmogria or Immaterial Missing Power are junk. It's not like it's much worse than one of the Fate spinoff games licensed by Capcom that probably sold 100K+ easy.
The sales also seem to suggest that just because a game costs $10 or $15, doesn't mean you can expect people to put up with stupid designs. Going by the polls from the same site, Perfect Cherry Blossom and Imperishable Night consistently have the highest marks, but sold only half as much as Embodiment of the Scarlet Devil. This is probably because EotSD is the first Touhou game and is stupidly hard and nobody in their right mind is going to waste $10 on a game that you cannot beat on Easy. So I'd guess people bought the first game and was turned off by the fact that they just wasted $10 on a game that cannot be beat, and then resorted to piracy thereafter, because according to the polls the number of people who played the major Touhou titles is consistently at 14K for all major titles despite a rather large difference in sales.
And keep in mind the Japanese are probably some of the least piracy/cheating prone people in the world. When Phantasy Star Online came out in Japan people actually played the game legitmately and Sega was very surprised to find it was hacked to death the first day it went to US. It's kind of depressing if you think about it. Does anybody have a story of some independent game developer that does pay off? Not necessarily super rich, but do well enough so you didn't lose money? Well the guys in Typemoon obviously made a lot of money, but then they went commercial too, and if you got a series anchored by someone as good looking as Saber it's usually a license to print money in the cute-obsessed world of Japan anyway.
Embodiment of the Scarlet Devil - 2777
Perfect Cherry Blossom - 1320
Immateral and Missing Power - 588
Imperishable Night - 1303
Phantasmorgria Flower View - 692
Shoot the Bullet - 1223
Mountain of Faith - 2251
Scarlet Weather Rhapsody - 2758
Subterrean Animism - 3928
One of the polls in Japan puts the number of people who has played the series at 14000. It appears the sales number are fairly comprehensive, or at least as comprehensive as anybody could find, so that seems like there is also close to a 80% piracy rate. Somewhere around Mountain of Faith Touhou seem to hit a cult status due to internet videos, as you can see there's a huge drop off between the Scarlet Devil Rhapsody and Mountain of Faith before rising again.
For comparison, the other cult fan game in Japan, Tsukhime, had some unknown number of sales in the dojin era, and then Typemoon went mainstream and Fate/Stay Night and Fate/Hallow Ataraxia both sold 100K+. Capcom also licensed 3 more Fate series game for PSP/PS2 and I assume if Capcom was wiling to license your brand it's probably going to be pretty profitable.
Now I know the maker of Touhou, ZUN, does this as a hobby. But if I was making a game and it sold 588 copies, I'm not even sure if I'd continue making the game. It doesn't really matter that Phantasmogria or Immaterial Missing Power are junk. It's not like it's much worse than one of the Fate spinoff games licensed by Capcom that probably sold 100K+ easy.
The sales also seem to suggest that just because a game costs $10 or $15, doesn't mean you can expect people to put up with stupid designs. Going by the polls from the same site, Perfect Cherry Blossom and Imperishable Night consistently have the highest marks, but sold only half as much as Embodiment of the Scarlet Devil. This is probably because EotSD is the first Touhou game and is stupidly hard and nobody in their right mind is going to waste $10 on a game that you cannot beat on Easy. So I'd guess people bought the first game and was turned off by the fact that they just wasted $10 on a game that cannot be beat, and then resorted to piracy thereafter, because according to the polls the number of people who played the major Touhou titles is consistently at 14K for all major titles despite a rather large difference in sales.
And keep in mind the Japanese are probably some of the least piracy/cheating prone people in the world. When Phantasy Star Online came out in Japan people actually played the game legitmately and Sega was very surprised to find it was hacked to death the first day it went to US. It's kind of depressing if you think about it. Does anybody have a story of some independent game developer that does pay off? Not necessarily super rich, but do well enough so you didn't lose money? Well the guys in Typemoon obviously made a lot of money, but then they went commercial too, and if you got a series anchored by someone as good looking as Saber it's usually a license to print money in the cute-obsessed world of Japan anyway.