Here is my approach on questions related to third party modules, not just Magmi. Let me know if it's right or not.
I don't vote to close a question related to third party modules right away. There is a chance that someone else has used that extension and fixed the problem in the question.
So I let the question live for some time.
If the question does not get any answer it is usually bumped up by CommunityCommunity. When I see it bumped up I vote to close.
I think we should treat Magmi questions the same.