The coupons and bonuses you claimed can be found in 'My Rewards'. You can also view the balance of your bonuses in 'My Assets'. The coupon/bonus amount is calculated based on the real-time exchange rate at the time of distribution. For example, if you receive a $500 bonus and BTC price is $50,000 at the time of distribution, 0.01 BTC in bonus will be credited to your account.