What are the implications, if I choose a Creative-Commons-license for my work? Cory Doctorow seems fine with this. Is this exceptional?
For Cory Doctorow it has attracted a great deal of attention to his work that he would likely not have received otherwise. If he has twenty times as many readers, but the proportion who pay for the text they read drops from, say, 70% to 10%, there is still about three times the turnover.
Is it good for you? Some considerations:
I've wondered about the idea of releasing texts as minimally formatted text files under a CC-AS-IS license, with a beautifully typeset version available as, say, a paid e-Book or printed. This would be trying to exploit point #2.
My work is mostly concerned with scientists who want to reach as many readers as possible. This might seem to make CC publishing ideal, but in fact it is troublesome: to attract readers, they need to publish in prestigious journals, which are not CC and want copyright assignment. So the goal of reaching readers here speaks against the CC route.
I'd be hard pushed to think of any other well-known authors who do this at present but I think it may become, as they say, a thing.
Here's my perspective. Kindles and the like are becoming more and more popular, so electronic distribution of books is becoming easier. The author has two enemies, the enemy of the popular author is piracy or thievery, people accessing their popular work without paying for the privilege. The budding author has an entirely different problem obscurity.
When you start out you are vying for people's attention with thousands of other products and you need something to appeal to readers. Just allowing people to read your stuff for free is a great way to combat obscurity at the present time.
Obviously the only practical way to do this is via downloads. One day I imagine there will be many free books to download (as in books intentionally designed to be freely downloadable from the outset) there already are a significant number of classic texts on sites like the Project Gutenberg ones. It's only a matter of time before some authors become of the mindset that, at least to begin with, fame is better than fortune to start out with.
When it's not so special to be offering a free download of a book an author will have to think of even more ways to attract what the marketing fraternity charmingly refers to as "eyeballs". Until then there's a small upcoming niche available for those who capitalise on the wider distribution channels for electronic texts and the relative rarity of offering CC licensed materials.
Most people, I should point out, believe I am crazy.