Just a rumor I heard about primedice, Do you trade with users deposit?
Just curious.. where did you hear this rumor? i think they don't do trading with users deposits, there's is no need for them to do that, they make pretty good profit with their business.

This is a pretty ridiculous rumor in my opinion.
First of all Bitcoin trading can be high leverage up to 100x on Bitmex so it doesn't make sense to trade with people's funds.
Second of all why trade and risk losing money when they can do nothing and enjoy the passive dice profits?