I am trying to add links of all the images to the Facebook product feed (we use Flexify). This way we can pick which image we want on Facebook itself - depending on which campaign we run. Does anyone know a way we can automate this? The closest I have come is editing the additional_image_link field in the bulk editor, but this means the images can get outdated really quickly as it's just a text field?
I use DataFeedWatch to achieve what you're trying. The automated rules make it easy to maintain your Facebook product feed (as well as Google Shopping). You can pull in whatever product images you want into the additional_image_link field, which is good for customising dynamic product ads and using their slideshow feature.