In a middle of typical morning I saw the battery of my smartphone quite lower than what I expected so I looked at power usage :

Hey, wait a moment, I haven’t used Google Play Music! It must have been working under the wood:

Dear Google,
I understand that you strive to provide refined, responsive, polished services yet three gigabytes of data in two weeks are an order of magnitude or two bigger than what I would consider a fair usage of my bandwidth for a program I haven’t run in months, for music that I haven’t listened to since last autumn.
So thanks for all the fish, I’m going to un install Google tunes. I’ll use it properly confined into a browser I trust which incidentally is not Chrome.
Your truly
Paolo Redaelli