There are various questions on quant.SE which were asked by some user who then never goes online again.
It is probably not surprising that no answer will hence be ever accepted. I understand that this is a usual risk, however as I was told in this post, an unanswered question hurts the rating of the quant.SE site to graduate from its beta status.
So is there a way to accept an answer e.g. by moderator or to close the question for "not being online"?