Does anyone know why Google ("organise the world’s information and make it universally accessible" ¹) don't allow people to disclose their YouTube earnings ("It

Does anyone know why Google ("organise the world’s information and make it universally accessible" ¹) don't allow people to disclose their YouTube earnings ("It’s a violation of my agreement to say how much a comparable number of Youtube plays pays" ²). Or have I misunderstood her quote; since last year she did reveal such figures ("more than 1.9m views of videos on YouTube – mostly those uploaded by other people featuring her music – earned her $1,248" ³) - 1 http://zoekeating.tumblr.com/post/108898194009/what-should-i-do-about-youtube - 2 https://www.google.co.uk/about/company/ - 3 http://www.theguardian.com/technology/2014/feb/24/zoe-keating-itunes-spotify-youtube-payouts