I had many un-used domains I've purchased over the years (>40) and I wanted to make use of them without having to spend time, so I built Newsy - launched 9 months ago.
It turns your un-used domain into a Reddit-like content aggregator with all sorts of features - membership, voting, comments, newsletters and monetization. The best thing for me is that it is completely automated and all of my domains are hosted on the platform. :) Not Ramen-profitable yet, but pushing it to get there.