Acceptance standards at Crestock are very high, I've only been able to get 60 or so images accepted, it seems that Crestock, perhaps wisely, are not trying to grow a vast image collection but creating something of a manageable size with only 'the best' images. I have seen sales from my small portfolio, which at very least places Crestock somewhere above those sites which are simply a waste of time with no earnings.
The images are as expensive as istock, but quality is very high, there seems to be less wading through irrelevant 'spam keyworded' images on this site, the results feel like a full price stock photo site not something that is crowd sourced.
The estimate of 1 million images is very rough, this site alludes my usual process of obtaining the number of uploaded images, they don't publish the number of images they have, that always makes me a little suspicious, but a search for a more obscure subject or a world travel location is a good indication that the number is not massive.
Judge Ross is the name of the Crestock image review 'character' (it might be a real person I don't know!). If you are a crestock contributor then go and have a look thought the judge ross's "Today's worst image' archives and read the comments on each, if you do ever feel that your images are less than worthy go and have a look here it will cheer you up, if there was one part of the site that screams for an RSS  feed then this is it.
Somewhat poor when it comes to individual submission feedback, comments like "over / underexposed" when applied to one photo are just not helpful guys, now I can tell it must be the overexposure that you have complaint about when I upload a hi-key photo with a burnt out and out of focus background - fine, but a photo with some details in shadows and highlights and not much at either extreme of the histogram?, how exactly is the statement "under / overexposed" supposed to help me correct the image? not very helpful.
Crestock was recently acquired my masterfile who have been in the image licensing business for almost 30 years. I'm currently watching what happens and will give this review an overhaul and more news comes in. In November 2011 Crestock announced that their crestock image collection would be available on masterfile.com