Well, that's the news. I became exclusive to DT today :)
I think it to be a good choice for an amateur like me that doesn't have tons of time to work with lots of agencies. And the reward 0,20$ per uploaded image may look humble, but considering that in my country postgraduate students like me now get monthly scholarship less than 50$ it's a good help.
Also, I heard that exclusivity affects how high your works appear in searches so I hope sales will go better now.