Information about the fantasies of subjects (which the hackers called "cheating dirtbags") was reported available for 90 minutes.
Update: Aug. 19
Media outlets report that a lot of details were released today by hackers for vigilante "morality enforcement" motives.
Early notes from analysis of the release by John Herman, here, Tim Lee on Vox has an explanation here. One danger is that people could have been entered onto the site without their knowledge.