Developers can now generate promo codes for the Mac App Store.
This is nice for developers who like doing promotional giveaways and other things (handing out to reviewers) to get their App out. iTunes Connect has been updated to reflect these changes. Keep in mind that you are still limited to 50 promo codes for each version of the App. These codes can be used for any Mac App Store internationally, according to the update.
Here's the snippet from the iTunes connect update:
"You can now generate promo codes for your Mac apps in iTunes Connect. These promo codes can be redeemed in any Mac App Store worldwide. For each version of your app, you can request up to 50 promo codes."