It's them being anonymous really, and the fact that most people are naturally assholes. Even acts of kindness in real life is just people being selfish and either wanting people to think good of them or not look like an asshole. Doesn't apply to everyone but most of them.
Ltd predictions by the time 9th Gen comes out
Ps4:110million
Xbox one :75 million( was 65)
Wii u: 20 milliion