Meta questions about questions on a specific Stack Exchange site should really be asked on that site's Meta, rather than here on the general meta site for the entire Stack Exchange network.
That allows you to get targeted feedback from the community in which you asked the question, and ideally, from the individual users/moderators who actually voted to close your question.
Thus posting the meta question that you did is exactly the way I would advise you to proceed.
In my experience, both here for questions on Stack Overflow and on the other SE 2.0 sites that I participate on, questions inquiring about the closure of a particular question receive relatively rapid responses, and often, as I said, by the very same people who voted to close the question!
If you're not having that luck on Answers.OnStartups, that seems to be something that you should take up with the community there. Communities are free—and in many cases, even encouraged—to establish their own standards for questions and set their own parameters for topics.
We could give you general advice on how to ask questions that won't get closed and general feedback on the types of questions that are discouraged across the network, but I suspect you already know most of this, as you can read it in the various FAQs.
That said, I don't think your assessment of the Answers.OnStartups community is at all fair. Zuly, the moderator who closed your question, seems very willing to attempt to explain her rationale for closing the question. Her meta question that you linked to was actually opened of her own volition in an attempt to solicit community feedback with respect to this type/category of question. As she said in a comment to your original question on that site:
...I'm closing it for now as "too localized", but I started a thread on meta to discuss this further. These type of questions have come up in the past, so I think it's important to discuss this, and come to a decision on whether we allow them or not. If the consensus is that they should be allowed, we can easily reopen your question. Feel free to share your thoughts.
I must say, I'm not really sure what else you wanted or expected. You've been given not only the right to know why your question was closed (as your title asks here), but also the ability to voice your opinion about the nature of the site itself. That seems pretty fair to me. You aren't guaranteed that others will agree with your opinions.