A: Thanks for the query. In such case, you will need to use the combination of both daily and lifetime credits. Each day the first 4.5k emails will get verified using the daily credits and the remaining will get verified using the lifetime (instant) credits. After finishing the 700k instant credits, you can purchase additional instant credits at a cheaper rate (cheaper than here with an auto discount applied). Please contact our support if you have further questions. Have a great day.