Good post. I’ve found I make more money going exclusive with some images rather than spreading them around to several agencies. Another reason for pulling a portfolia could be lack of time. As many microstock photographers are part-timers, sometimes there’s just not enough time to do multiple uploads to several agencies. It’s easier to pull back and concentrate on one agency rather than spreading yourself too thin uploading to five.

La Roach

A couple other reasons may be because they are going exclusive or because they sold the rights to an image.

-Steve