Amazon dit vendre plus d'e-books que de livres en papier - Numérique. Inéquitables droits du livre numérique. The one who isn't easily replaced. The law of the internet is simple: either you do something I can't do myself (or get from someone else), or I pay you less than you'd like.
Why else would it be any other way? Twenty years ago, self-publishing a record was difficult and expensive. A big label could get you shelf space at Tower easily, you couldn't. A big label could pay for a recording session with available capital, but it was difficult for you to find the money or take the risk. A big label could reach the dozens of music reviewers, and do it with credibility.