Nope. I haven't. I've honestly only recently heard about them when they have listed GMD.
Yes, they do tend to list various tokens without having permission from the project team.
I guess that's their way of bringing in more users and traders into their exchange in hopes of increasing their volume. 
The GMD team is adamant about warning those who hold GMD tokens in trading in Probitex. They're new and don't have an established reputation yet. We don't know what they'll do the next day. You know what I mean.