https://petapixel.com/2022/08/22/white-house-photographer-threatened-over-his-own-public-domain-photo/

If you print and frame a public domain image and sell it, that's fine. You've provided added value to a free image. But a company selling a downloadable
.jpg or other file can hardly claim the same.

Example of a Hubble image:

https://www.gettyimages.ca/detail/photo/amazing-crab-nebula-royalty-free-image/85758295?adppopup=true

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