Or because girls are willing to play as boys, and then pay to play as a girl?
But boys are unwilling to even play as a girl?
I prefer to look for rational (for example economic) reasons for things, and not assume everything is because of bias.
So... consciousness raised and subsequently tamped back down, I suppose.
You can't change the world by yourself but we all play a necessary role: Politely and respectfully speak up where people are not aware. IMHO no individual, no matter what their social capital, can substitute for people seeing and hearing these things from their peers. Also, we tend to be follow the herd; even in an angry stampede, one voice can make several others in the herd slow down and think.
Yes.
When something is virtually identical the whole world over, I think I can comfortably say biology and not culture.
Statements like this, which partition people using one trait, and then confidently assert that the subsets differ dramatically in some other trait, are nearly always wrong. There will invariably be more differences within groups than between them; that is a property of human beings.
I know first hand this sucks. I have a daughter who just a couple days ago had me to download the Oz Temple Run game. She was very disappointed that the main character was a boy, that only 1 of 4 available characters was a girl, and that the girl was the hardest to unlock. We aren't spending running on virtual currency, so odds she'll never get to play the game as a girl.