Facebook Open Graph Multiple Images Do Not Display in Feed - facebook

Question

I'm curious to know if multiple images actually show up in the feed. I know they're supported but in not one single case of testing have I seen multiple images show up on the feed. So what the point in having multiple images in the open graph object? Where do secondary, tertiary images go?
An image URL which should represent your object within the graph. The
image must be at least 50px by 50px and have a maximum aspect ratio of
3:1. We support PNG, JPEG and GIF formats. You may include multiple
og:image tags to associate multiple images with your page.
Doing a test with object debugger clearly shows that they're in there correctly (sans the image type property):
https://developers.facebook.com/tools/debug/og/object?q=http%3A%2F%2Fpluggin.it%2Fs%2FTI4o%2F
(http://pluggin.it/s/TI4o/ - note the OG tags only show up for Facebook user agent)
You may specify multiple images using this markup. The first image
matching minimum requirements is the default selection. A Facebook
user authoring a status update might select a different thumbnail
based on your explicitly-defined images. A hotel might include
multiple photos of the property as Open Graph protocol images,
allowing the person sharing the story to share a view of the pool or a
view of the restaurant.
Basically I know how to get images into the graph, but I can't seem to find where / how they are displayed in new feed. Are apps like Instagram putting images into photo galleries rather than using open graph? Is that how they display multiple images?

Answer 1

There’s always only one image in these feed posts.
“A Facebook user authoring a status update might select a different thumbnail based on your explicitly-defined images.”
When you give multiple images in your OG tags, the user making the post has the choice between them while making his post. He choses, he posts – and that image chosen stays the one image for that post.