@burcinc-- As far as I know, the farmers take the down after the eggs are hatched and send it off to cleaning and processing. They don't leave the nest bare of course, they add things like hay so that the chicks remain safe and warm.
And the down farmers of Iceland really care about the eider. They care for them year around and take precautions to protect them from predators and other dangers. Aside from down harvesting time, the eider are left alone and never leave their natural habitat. The down is cleaned and processed and made into comforters, quilts and other products in various countries in the region. Eider are not disturbed in any way.