CEX.IO is not a scam.
The exchange is very easy to use. Withdrawals and deposits are fascinating. (I'm afraid it was while they were not so big)
However, they can freeze your funds with far-fetched reason. I have an experience of returning my money back. The process took tons of emails and ~month.
Truth to be said, they have warned me that they are going to freeze my next deposit, but I missed this email and performed deposit...
So I recommend you to track your inbox from CEX before depositing in order to avoid freezes.
They do have good support team members. PM me if you would like to get their contacts.
LOL, this language sounds so familiar. Everybody please give warm welcome to CEX scam support staff.