People love to jump on this as a 'severs them right' microstock attack. The truth however is, there is a ton of traditional RF stock in this deal as well. John Lund has 17 for example, there is lots of images from Blend (trad agency), people who paid $50 to have their images in the Photographers Choice program on Getty had their images stuck in here.
There photographer got $12 and now the image is on Google Drive available to anyone for free.
Sean Locke made a nice overview about what is all going on herehttp://seanlockephotography.com/2013/01/18/the-getty-google-drive-situation/
There is a massive thread on MSG about photographers planning to deactivate their portfolios on Feb. 2http://www.microstockgroup.com/istockphoto-com/d-day-(deactivation-day)-on-istock-feb-2/