I have just been told about this from last.fm:
Today we're announcing an upcoming change to the way Last.fm Radio works in some parts of the world. In the United States, United Kingdom and Germany, nothing will change.
In all other countries, listening to Last.fm Radio will soon require a subscription of 3.00 per month.
You can read the full story here blog.last.fm/
I would have understood that everybody should start paying for the radio service, but discriminating countries is way too much...
My account is already deleted.