Getty Images makes its images free to use
We have been doing embeds for about a year now, having Getty come in does excite us. Innovation in this space is definitely  necessary - http://imgembed.com/Most importantly we use flattened jpgs to facilitate responsive designs and current CMS auto-generated thumbnails while Getty uses iFrames.We aim to be a fair marketplace, so our ethos might differ slightly from corporate Getty. Photographers strictly retain their rights and we only act as a facilitator.Free use is limited to 10,000 impressions but is allowable for commercial use. Our belief is that beyond 10k impressions, you are probably making enough that the photographer should be fairly compensated. While we might suggest image pricing, that is fully up to the image rights owners, giving them full control.