Copying an answer by Robert Cartaino on a related question elsewhere:
This can be an effective means of gaining notoriety for a site if you approach it with the right mindset. Instead of setting out to simply "re-ask" questions on this site, look for ways of "helping experts" as a means of gaining notoriety of this site. That doesn't mean raiding forums, but seeking out to bloggers and other experts you can help right here.
From the blog post — Helping The Experts Get Answers:
Reach the right kind of publications and bloggers. Make sure that the key experts in every field know about the site; not just the “Martha Stewart” big names; we want to talk to the people who go to these conferences.
But how do you reach writers, bloggers, and other notable experts in the field?
Help them get answers to their questions, too!
When you ask (and answer) those questions, be sure to close that loop and bring what you learned back to the real world. Let people know what you are doing right here by helping them with their problems. That's how this works.
Also, be careful that you don't come across as spammy. That will ruin History.SE's reputation there. Don't just re-ask questions, but try to help out the experts thee instead. It's not really about the QPD stat. In fact, let me include the last paragraph by Robert:
And for the love of god, stop flippin' watching those largely meaningless stats in Area 51. This site is doing fine. You know because users are asking good questions, getting good answers, and generally having a good experience with this site. How do you have a "precipitous drop" when you've been open for two weeks? Yeesh, already.
Don't be to concerned about the stats. The SE team takes more into account than that when considering a site for graduation. Hitting the right numbers there is not necessarily a 'switch' to exiting beta. We need high quality answers and experts. This idea can help with that, but it can be approached with the wrong mindset. We're not copy-pasting answers to raise the QPD stat. We're attracting more experts by helping them out with their problems.