This is one of my 'less performing' sites (with the caveat that I have done a full long term review, there are many worse performers i have not had chance to collect enough data on). The results are rather sad considering the time the site has been around and the otherwise good looking traffic and image statistics the site has attained in that time.

Poor Referrals:
Sales continue to be slow, and although I have referred 1000s of people to this site (as image buyers from one of my other sites not this site) referral earnings are still very low, the attached file says it all, more that 1000 visitors for the first three months of 2008 or so, and only 2 sign-ups, it's not the quality of the visitors I'm sending (I get good results from various microstock sites that I send visitors to) I'm beginning to believe it's the ability of 123rf to convert them into paying customers and interested photographers. Their site is full of hype about how you can make a few hundred a month and buy yourself an ipod or an xbox (what about buying a better camera???) and then tells you to "Sit back, Watch the Moolah roll in" It likely won't.  If anyone does see any 123rf moolah rolling through their front door be sure and let me know please, I'm genuinely interested in hearing about it.

Tools:
They have added a rather clever image identifier that allows you to upload an image and it will match it to one that looks the same or similar (more useful to a designer who has a comp image and can't remember where it came from) but it shows these guys are at least running with the ball.

I really can't recommend this one, except to the image buyer, they represent excellent value as an image source.