I find noncommercial (NC) restrictions in licences such as Creative Commons (CC0) very interesting on a platform such as STEEM since a court may see CC0 NC content posted on STEEMIT as breaching the noncommercial restriction since you get upvoted and earn Steem Dollars (SBD).
I guess we will have to wait for a court case to find out or anyone who can share some more light on the topic?