Non credited hubble/NASA images

Just FYI, I was searching for space or galaxy videos for a video I am working on. The search turned up dozens of videos that are clearly using NASA/ESA/Hubble images in AE compositions (space fly-throughs and zooms) Once I realized where all these backgrounds were coming from, I simply went to the original government sites and downloaded the hi-res images, which I will properly credit under the CC license. But unless I'm missing something none of the videos on Pond5 are properly credited. This seems a bit unethical to me, since the images are being sold. FWIW...