Well, as you may know, there is a re-open review queuere-open review queue. All questions that have any re-open votes on them will be sent to the queue and those with enough rep can review whether or not they should be re-opened.
The second way is via the moderator tools (available to all 2K+users). In there is a list of the questions with the most recent reopen votes and the questions with the most reopen votes.
With these two tools, mods and high-rep users can see these questions and either vote to reopen or let it stay closed.
As to your specific example, I saw it in the re-open queue and have voted to re-open it. However, only two three of our 98 eligible users have ever used that queue, which is a dilemma. It is a known problem that it is hard to reopen a question, but that might be "status by design". My guess is that the mods have seen the question and think it is still to ambiguous.
Note, it is fine to request a question be reopened here on meta. That's what meta is for. If you wish to discuss this specific question further, rather than reopening in general, either make a new question or edit this one to clarify. There's nothing wrong with asking for a specific question to be reopened on meta (although the request may be declined).