Yeah, those covers are definitely fan-submitted.
Many collectors are interested in what the packaging, casing, discs, booklets and memorabilia looks like for a Blu-ray release. Here you can find and share packaging images for Star Wars: Episode IV - A New Hope Blu-ray.
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That blip means nothing. Same true for the steelbooks. There is a distinction between user photos and the splash images, which are usually what’s up on Amazon, etc