Sacred Bones has an offer going via Bandcamp in support of the Standing Rock Protestors. Effectively, it is name your own price on anything here: http://sacredbonesrecords.bandcamp.com/
That is, FLAC downloads are free, but if you want to use the Bandcamp streaming support it is a minimum of US$1 per item. I’ve filled my boots with Moon Duo and Psychic Ills downloads and will peruse the rest of the releases.
The offer is good until December 4 and seems to be in support of a very good cause if media reports are to be believed.