I had actually pointed a 2 GHS X-11 Miner to the pool they specified.

The support said you're supposed to "eventually" get the coin but the server updates every 5 minutes so it refreshes your balance, but you should eventually get the coins.

But if you stay logged in, here is how it works:

Say you start with 1 coin: you mine up to 1.5 and the server refreshes.
You're not back to 1 coin.

You mine up to 1.5 coins a second time, server refresh, back to 1.

You mine up to 1.5 coins a third time, the server refreshes, but now you have around 1.3 coins.


So on and so forth.
So you do earn some coin, but it takes 3 server refreshes to earn 1/3 of what you should have.
In that timeframe I should have earned +1.5 coins, but instead I receive only .3 after 3 refreshes.
Thus giving only a 20% return every 15 minutes.