主要是下面也没看明白
麻烦高手翻译、或者解释下在这里买链接的注意事项。
Please Note:Your payment will be re-billed each month until you request a cancelation. All credits expire at the end of each monthly billing cycle (whether they are used or not) and cannot be rolled over into future months. For example, if you purchase 100 credits and use only 75 during the month, you are still re-billed for 100 credits.