Popularity of Creative Commons licences

One could easily comment that Creative Commons licences are becoming very popular on the internet as they are being linked often. It is now very common to find websites that link to a Creative Commons content licence, but just how popular is this model really? The CC blog has some raw data from Yahoo about how many people are linking to various CC licences, and the data is really interesting. Apparently, there are ten million links to the various CC licences, which are distributed like this:

It is really interesting to see that the most restrictive copyleft licence is the one that is the most popular with 37% (Attribution-NonCommercial-ShareAlike). With 10 million licences in use, this movement cannot longer be dismissed as a fad by silly liberal-pinko-commies.