Can we withraw that 10$ or we have to some trades or deposit first?
What does this mean "no fee"?
I dont understand this bonus can be used to get 10%, i have to give you back my bonus so i get 10%? What are we talking about now, bonus of 10$ or 10%?
No you cant withdraw the bonus, here is the explanation by alexrossi on how the bonus works :
Use of bonus balance
The bonus balance works as a 10% boost in all your bitcoin deals. When you buy bitcoins it works as a +10% additional bitcoins you will receive for the same money, when you sell bitcoins it works as -10% less amount of bitcoins you will give for the same money.
So for example, let's say that you have just signed up and you have your 0.025 BTC (10 USD equivalent) bonus in your account. Then you match a buy deal of 0.1 BTC, so you will receive 0.1 BTC + 0.01 BTC of 10% boost bonus in BTC from the system.
Now let's say that you have matched a 1 BTC buy deal, in this case you will receive 1 BTC + 0.025 BTC (all your bonus balance at once), this because the 10% of 1 BTC is greater than your bonus balance.
Last but not least, the sell case: you have always 0.025 BTC (10 USD equivalent) as bonus balance and you match a sell deal of 0.2 BTC (so you deposit btc and receive cash from the user). In this case, the 10% boost works as a discount, so system will ask you to deposit in escrow 0.18 BTC instead of 0.2 BTC
Hope that now is more clear how it works the bonus balance.
@alexrossi : I think you need to add this terms about how the bonus work on the OP, because some people still asking the same question regarding the bonus.