When I uploaded my Id to cex.io, they abruptly deactivated my account without any information. Later on enquiry they told me that my account was deactivated due to their kyc policy but they didn't reply what kyc policy was violated by me. I hv accounts on other reputed crypto exchanges on the same kyc documents & they never objected anything. CEX.IO behaviour is strange in my case. I never didanything against their policy.