The InkBox pricing model is real simple. You only pay when you send an Email campaign to more than 5 people.
The InkBox pricing model works on a credits basis, you buy credits upfront, and use them as you send campaigns. (Almost like a pay-as-you-go option with prepaid airtime).
For all campaigns there are a flat delivery fee of 500 credits plus 1 credit per email recipient.
You can use the credits any time you wish and they never expire. This also means there are no monthly costs involved, so if you do not send any campaigns it does not cost you anything.
The following table is a guideline, but you can buy any number of credits. So to start out you can buy just 1,000 credits to send to a list of 500 users for example.
Every time you buy credits, the first 50,000 are 13 cents (R) each, the next 50,000 12 cents (R) each and so on. So if you know you will be using a lot of credits it is better to buy in bulk to get the discounted rate.