Comment on Introducing DuckDuckHackparentComments−tantalor14yTheir usage is noncommercial (no fee) and links through, so it satisfies CC BY-NC 2.5.See http://xkcd.com/license.html
Comments
Their usage is noncommercial (no fee) and links through, so it satisfies CC BY-NC 2.5.
See http://xkcd.com/license.html