I often buy stock images and assets from other sites, but avoid buying from Photodune and GraphicRiver because the thumbnail previews are too small. It’s just too frustrating hovering over tiny thumbs, waiting for the larger previews.
On a page like this they’re only 80x80
Compare that with Adobe Stock and I can see big beautiful previews.
To make it more frustrating some products don’t even have a preview. The thumbnail will be a some kind of branding or text overlay.
It’s really annoying when your have to spend hours scanning through 1000s of images.