The images on that site aren't free, they're royalty free. That means you have to buy each photo with an upfront payment, then you can use it as often as you like. I hope you're not just copying them off the site!!
I use Flickr - Advanced Search, then click "Creative Commons" and "for commercial use" at the bottom of the search page. I find I always get a huge selection to choose from.
I agree with wilderness it is always best to use your own photos. I believe it looks better and makes the visitor feel they are reading something more personal.
But there are some hubs where I have to use free photos. I have never used Creative Commons but will have a look from the comments here it looks a good site to use. I notice some of your hubs are about shoes and home products. If you have a digital camera it would be easy enough to take your own photos for these particular hubs.
I usually just go to my web search bar, and type in 'whatever subject or image' and add the phrase, 'public domain photos' at the end.
I take all of my own product photos for my offline business and my Etsy shop, and lots of pix of my cats...but I don't have any photos I've taken of the things I would need to add to my articles, so I just search for public domain photos.
There are a lot out there. Sometimes, there is a person's name as the photographer, so even though you're allowed to use the image, it is best protocol to credit the photographer and the website from which you gleaned the photo.
I check out many of the new hubs as they come across my Home page. I'm interested to see how many people use their own original work, how many correctly use and credit public domain photos, and how many are outright...
Hey hubbers Can anyone point me to some good places to get good free pictures I can use on my hubs. I am looking for pictures of Argentina and the Dirty War etc and am having little luck on the site I use. Thanks!