I had a great run with DT, and then, like other sites, there was a stair step decline to a more than 50% reduction in royalty payments. I still upload photos there, but DT is the last site I upload to with minimal excitement. I don't sell video there and I have built about 1100 video assets in 12 months. To be fair, DT is still above the other sites I just cut ties with (Most Photos, Stockfresh, GL), but they are still declining for me month over month on declining volume. I am also opted out of EL's but I rarely got those anyway.
I would love for them to change a few things. With the problems forming over at Pond5 someone has a real chance to take video share if they shape their program correctly. Funny, I just had all 120 of my last video batch rejected at P5, and have sold three of those videos already elsewhere in a few weeks. But the $20 or so I got could have been more if they sold on P5.