Most of the AI Art Generators I use create four images with one prompt, and most of the time I can use one or two images out of the four. Most of the AI Art Generators also save your images with your profile - so you can come back and look at them and decide which one you want to download.
PicFinder is different: It generators far more images than any other art generator, but it does not save them with your profile. So you have to download them in order to save them for later usage. You have two options: you can either download them as 512x512 px files, or you can enhance them and download the enhanced version (which takes more time of course).
It took me a bit of time till I found a satisfying solution for me. I quickly go through the images and download all those I find interesting.
So I keep them in the original size. I can always go on:
https://www.pixelcut.ai/image-upscaler
and upscale / enhance them.
Well, some art generators allow commercial use and some do not. In order to be on the safe side I now can see where the image file comes from and can use it commercially or not.