Royalty-free images have always been a bit of an annoyance for online content creators because, quite frankly it’s a bloody minefield.
I personally know more than one marketer who’s been landed with an out-of-the-blue demand for several thousand dollars because he’s unknowingly used an image that was owned by one of the big stock image companies such as Getty, Shutterstock or iStock.
Now with AI it’s a lot easier to create images you can freely use (although do your due diligence on this because I’m no legal professional and I’m not giving legal advice here) even if you can’t copyright them.