One of my friend also faced the same situation, he sends many tickets to Poloniex. The first time he sends the very little amount of ETH like 0.15 ETH but support people answered him you need to send minimum 1 ETH in order to be credited. After sending 1ETH he got his deposit into his account.
1.0 Eth? It says in their deposit only 0.5 Eth. I see. I only deposited a total of 0.85 Eth.. Only using 3 cards to mine for now (0.2 Eth / week casual miner). Guess I gotta wait till next week.
That´s a totally new situation if the Deposit minimum is 1ETH...