First, ethermine has a default minimum payout of 1 ETH, so your eth would be released until you mine 1ETH on ethermine, which means your eth is still on ethermine, not poloniex.
After you hit the minimum, ethermine will send your eth to the wallet you use, and they will pay the transaction fee.
Expect 1ETH on your polo account for the next coming payout.
I wouldn't recommend using a wallet on exchange (not safe) especially those with minimum deposit.
Also, poloniex has been having issues with their withdrawal system.
I made a sia withdraw a month ago, it's still in processing.
Their support never replies so good luck using it I guess :/
The default is 1, but you can change this to like 0.25 if you want, in the settings.
I agree that one should leave a minimal number of tokens on an exchange wallet. I was mining some XMR to poloniex some time ago, until one day I realized they changed my wallet address for some obscure reasons. I did not receive any e-mail from Poloniex warning me about this. I had like 3 XMRs out in the wild on an address I had no way of accessing. My support ticket is still open...I contacted a poloniex guy on reddit and I think he got my XMRs back as I saw some appearing on my "new" monero address on Polo.
Been mining to my personal XMR wallet since then. Got all my ETHs out of there some time ago already, still have a bunch of SIAs on there I haven't touched, but they had so much issues with SIA I thought it better to leave it where it is...you just can't trust an exchange. Use it to trade and get the majority of your funds out.
I have curious issue with Poloniex too...if I pay 0.5 or more in one transaction, it goes well and after few minutes ETH is on
my wallet...however, If I pay it in few small amounts, I get it about 5 days after those small amounts sum reaches 0.5 ETH needed
to be put into wallet
meanwhile, this guy
https://etherscan.io/address/0xD2aafc30CFA2A7ddb7F1A7a24Dc7606a9cd482C3claims his transactions from ETHERMINE (like original poster) of any value get on his
wallet as if theres no minimum amount on either Poloniex (0.5ETH) or ethermine (whatever amount is there)
How?
Polo says : The minimum amount for deposit is 0.5 ETH. Smaller deposits will be credited once they total this amount.
I think you're confusing transactions with crediting. If you set Ethermine to send every 0.1 ETHs, a transaction will appear on the network with that amount from Ethermine to Poloniex. Poloniex will just hold those credits until they total at least 0.5, at which point you'll see them in your polo wallet.