I disagree. Hot or Not was a huge success, but not in the dating market. They launched a dating extension to the website that never really took off (http://meetme.hotornot.com/).

Look at their stats: http://siteanalytics.compete.com/hotornot.com/?metric=uv

People used HotorNot for fun, not for finding real dates. I suspect the case will be the same here.