I was asked the same question. When the system told be to deposit 0.01BTC first I started asking questions on chat:
Me11:06
Hi, I have 1.34 bitcoin on my account, yet I cannot withdraw
Verification Manager [James] joined the chat
Verification Manager [James]11:06
Hello, provide me your email please, so i can check.
Me11:07
****@****.com
Verification Manager [James]11:07
Just a minute please.
Verification Manager [James]11:08
I see now. In case to withdraw you need to deposit 0.01 bitcoins first. After deposit your account will be verified in 1-2 minutes.
Me11:10
Why do I need to do that?
Verification Manager [James]11:11
To verify your account. Since you're new user and got transaction to your balance for more than 1 BTC, you have to pass verification process to withdraw it .
Me11:12
How does that verify me!?
Verification Manager [James]11:13
I can't tell you how our verify system works, sorry. It's not public information.
Me11:19
I smell scam
Verification Manager [James]11:20
We don't force you to deposit something, but if you want to verify your account , you have to do it .
Me11:40
There is no link between my email and the btc address I send from....
Me11:41
Anyone can activate my account, that does not verify a thing
Verification Manager [James]11:41
Verification Manager [James]12:13 PM
I can't tell you how our verify system works, sorry. It's not public information.
Verification Manager [James]11:41
Do you have any other questions ?
Me11:42
Where can I see my account history?
Me11:42
Where did I get the 1.34 btc from?
Verification Manager [James]11:43
We don't have transaction history for users safity.
Verification Manager [James]11:43
But you may request this info from me.
Me11:44
Ok, where did it come from?
Verification Manager [James]11:45
Provide me your email once again please.
Me11:45
****@****.com
Verification Manager [James]11:46
daqlipos@protnmail.ch - this user sent you 1.34 bitcoins.