Okay, thank you all for help, I am not giving anything to them

Hey, so I have found this site trade8.to which seems very legit to me. It has many features which work flawlessly. The main features of the site are trading currencies, stocks and crypto. But margin is settled in bitcoin. They have registering bonus 30$ running so I decided to give it a try. I made some profit and wanted to withdraw some and they want 0.01 btc deposit to be able to withdraw (which I know is a common scam tactic, but at the same time phemex.com has 2$ registering bonus and requires it too and I am pretty sure phemex is legit).
Does anyone use it here ?
Do you think its legit or a scam ?