C-cex is staking customers PoS coins, and most likely dumping them on their exchange. When I questioned support about it, this was the response I got.
2016-07-19 14:35:42 C-CEX support
Usually we disable staking. But sometimes when wallet hangs or require resync our staff restart it and forget to disable it. If you don't want your coins staked - just keep them in your wallet.
http://imgur.com/a/EA1bKStaking gets disabled in the .conf, so no need to disable it when wallet restarts. Funny how none of the other exchanges have this issue........
I got my first ban, after three years, for mentioning c-cex staking their coins. Perma-banned for saying they went to the dark side.
Not looking good, if you look at the what happened towards the end of Craptsy. Too many similarities, and too many scamcoins added each week, probably in house coins. No respectable exchange would list the crap they have lately. They have been listing coins with no block explorers........ Approach with caution!
If any of you have withdrawn from c-cex recently, check your transaction, and see if it came from a wallet that was staking.
I will be posting this in every PoS coin thread that is listed on c-cex.
Good luck with your coin. Maybe without c-cex dumping their stakes, there could be less sell pressure.