They did try to sell it for a couple of years but by that point in 2014 I think they had essentially given up already. But the revenue was covering the hosting costs so it seemed sensible to just leave it going, and leave possibilities open.
as an entrepreneur, you should know when it's time to let go. either you continue the start-up a.k.a the experiment, and try to iterate towards a more successful direction - or you shut it down. I think standstill at such a point is really the worst of all options.
