Some useful information about the credits
Customized credit plan not possible
You can only choose from the credit plans you can see on the Buy Credits page. It is not possible to purchase a customized number of credits, only the credits plans listed there.
No monthly or annual/yearly plan
When purchasing credits, there are no monthly or annual plans that you can choose from. The payments are one-off, pay-as-you-go payments. If you run out of credits, you can buy more on the Buy Credits page.
The credits you purchase never expire. You can use them whenever you want to or need to. There is no limit on how long you can use them. There is also no limit on the number of email verification attempts you can make with the credits. This means that you don't have to use them up all at once.
Once you purchased the credits, it may take some time until they appear in your account. Please wait a couple of minutes after you bought the credits, they should appear soon at the bottom left corner of the page.