There are two main withdrawal methods. 1. Withdrawal without fees after a 7 days unstaking period 2. Immediate withdrawal through a decentralized exchange such as Everdex.

The benefit of withdrawal after unstaking is that you don't have to pay any fees, but the downside is that you have to wait for a 7 days unstaking period before you can withdraw. On the other hand, withdrawing through a decentralized exchange has the benefit of immediate withdrawal, but the downside is that you'll have to pay a fee of around 0.3%.

You can withdraw through decentralized exchanges such as Everdex.

The reason why the available quantity for unstaking smaller than expected is slight different from the exchange rate is because the quantity of staked tokens are managed in terms of shares and are divided in integers. During this process, decimal values are rounded down (discarded), which can lead to subtle differences. For example, in certain situations, the calculation can result in a difference of 1-2 wei. This is also common in other staked assets, such as staked Ethereum (stETH). If you would like to receive additional (w)stBFC to fill in the difference, try clicking the Adjust Token Unit button at the top right corner.