Why aren’t my images being pulled for the giveaway?
For images not being pulled, typically it's because it was shared on social networks before an image was added. Social networks (like Facebook and Twitter) pull og (open graph) tags from the giveaway. The open graph image we use is the main giveaway image.
If you’re having trouble with Facebook, we encourage you to use the Share Debugger and see if that fixes your issue:https://developers.facebook.com/tools/debug/