On facebook's documentation, in "What's New" they have a link titled "Copy and Reuse Ads with Ads Copy API." which leads to this. Here, they have 3 links, all of them are currently broken.
My question is, how can I copy (and change) an ad, and more specifically, the ad's creative, which is immutable (therefore the need to copy instead of update)?
Update
At the time, we did get some information from our contact at Facebook. However, it meant this wasn't a good approach for us.
Also, there is now new documentation on copying ads, yet still it does not help us specifically, since it does not allow updating ad-creatives.
We've since abandoned this effort, and in fact, solve the problem by having Marketing personnel export the ads, update the field we needed by a script in an Excel file, then uploading back to Facebook.