I'm confused did he actually rip off the websites or did he think he was buying stock photos and they were stolen. I get photographers should actually take phot

I'm confused did he actually rip off the websites or did he think he was buying stock photos and they were stolen. I get photographers should actually take photos they claim too. but it seems like a much bigger issue if people other than the true owner of the photos are posting photos on stock sites and they are selling them. "I finished my day by reverse-searching as many images as I could find and traced many of Muldoon’s photos back to Adobe Stock, Alamy, Shutterstock, and Unsplash"