Darryl: voting for No Award falls under sections 3.10 and 3.11, and all categories where no award was given was because there were more votes for No Award than for any candidate. You can see the results at
The 2015 Hugo Awards Final Report
gbm: Voting No Award in every category where all nominees were selected by slate votes as a protest against slate voting is as legitimate a vote as nominating by slate. I was disappointed by the results in several categories because the categories clearly had nominees that could have been the nominees had there been no slate. I am quite concerned that Vox Day may keep his promise to nuke the 2016 Hugos by producing a slate that has no acceptable candidates in every category, and engaging his like-minded non-SF fan political base to stick it to the SJWs.