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I found it very useful when I needed a very specific image for a company brochure and didn't find anything existing.

I started to find fewer and fewer relevant free images. Most of them are now under a paywall, which to me makes no sense for the websites hosting them because they will drive regular users needing them to AI and they will become irrelevant quicker.

I have the same problem and it was just a matter of postponing until I had to dive into the matter :-)