For the first question, pc is less used by minors, even if they do, it’s most likely to be their family’s pc, which means they wouldn’t be able to download a h-game on, while android is easier to access and the minors have (nearly) complete control on that (not being used by others). And hotpink said they are considering to make all platforms paid. For the second question, I can’t find a way to explain. I know what’s wrong here, but I don’t know how to explain it.