Why am I doing this?
My personal motivation is to see more self-indulgent and noncommercial forms of music spread around so creativity is enriched. Why should corporate labels and commercial radio decide what we get to hear and make millions of dollars by exploiting artists? Why not let the people who love music decide for themselves?
What should you, as a musician, do?
If you are a like-minded independent artist not wanting corporate controls interfering with your creativity, and would like more freedom in society, then this is a way to spread your music widely. If your music is different and you don't think it has much chance of being spread on commercial radio then you can try the Free Music Philosophy. If you are tired of commercial interests controlling what is heard by the people and you want the people to decide for themselves, this is one path you can take. Finally, this way you could be on a major label or an indie and your integrity isn't compromised since you're giving your fans what they want.
What should you, as a music fan, do?
If the freedom of copying and using music appeals to you and you would like the idea spread around, then when you copy a album of anyone, regardless of whether they follow this philosophy or not, send them a donation to enable them to continue their making of music. What you contribute should be dependent on what the music was worth to you. You could also go to the artist's concerts or buy releases and merchandise directly from the artist. Finally, if you have the resources, you could support band(s) which have adopted the FMP by putting their music on the Internet. Support the music you like in some way! (This is independent of the notion of Free Music.)