"Images which are downloaded free of charge are all provided under the standard licence. You must publish a credit wherever the image is used to acknowledge the copyright holder for that image (ie the person who created the image)."
Which I know you already pointed out, but it's the specific terms as published on their site.
How come I went there, followed your link, and I had a $5 DL in my cart? That was strange?

"
We make it easy:
- no registration required
- corporate use is OK
- instant download
- option to purchase super high resolution files for use in print or graphic design
- optional member registration gives access to lightboxes and email-to-a-friend features
We invite professional photographers and graphic designers to submit images for inclusion on the website. Our contributors tell us they make more money with us than other stock libraries."
No registration? Instant DL? Anyone see a huge hole open for abuse and image theft?
Last line had me laughing:
Our contributors tell us they make more money with us than other stock libraries.