Why (non-mandatory) copyright assignment
This page used to talk about why we did optional copyright assignment to the FSF. However, that policy has changed and the FSF has decided that for now, it is not comfortable with optional copyright assignment... it's all or nothing. So for now, it's nothing. :)
Rest assured that if you made a copyright assignment, you'll get a contributor drawing. In fact, I'll be widening the scope of contributor drawings... more on that soon.
- Chris Webber