as you can read here  http://www.prnewswire.com/news-releases/istockphoto-announces-exclusive-deal-with-worlds-top-selling-stock-photographer----and-lowers-pricing-on-half-its-library-215622511.html there are few news .

New Unique Content: The Arcurs Collection - Only at iStockphoto
iStockphoto is now the only site where the Arcurs Collection of photo, video, audio and vector elements can be found. Thousands of files are available today at http://istockphoto.com/yuri with more than 85,000 available by the fall of this year. Arcurs and his team of photographers create thousands of eye-catching images that are used by creative professionals globally. The Arcurs Collection builds on iStockphoto's growing library of millions of hand-picked, curated and edited photos, illustrations, vectors and videos, as well as audio from Getty Images, a global leader in digital content.

if i remember well istock have not the total exclusivity of yuri's works.

http://www.dreamstime.com/stock-images-business-people-hands-overlapping-to-show-teamwork-image6524574
http://www.istockphoto.com/stock-photo-8506606-human-hands-showing-unity.php

what ??

As a designer who buy on istockphoto i don't want to pay more for a picture that someone told me that's on exclusivity on one website and i found the same on others website for less.

Join the discussion here;

http://www.microstockgroup.com/istockphoto-com/new-pricing/msg330223/?topicseen#new