No, it isn't unfortunately.
You can at their sister site BigStock which should have most of their port especially after the bridge.
Bigstock is, unfortunately, one of the very worst sites to try and convert your credits though. A month or so back I wanted to just convert a few credits to buy a couple of images and it wasn't possible at BigStock. They only allow you to convert ALL your earnings at once. Needless to say I wasn't going to convert nearly 100 credits just to buy a couple of images.
DT and Istock are the easiest sites to convert credits and buy images.
