What do you mean by ‘Make Credits Recurring’

Recurring credits means a certain amount of email credits will be set for specific time period for the Subaccount.

Example – Master has selected time period ‘daily’, from 5 Mar 2018 – 10 Mar 2018 with recurring credit amount as ‘500’. Then between dates 5th march to 10th March everyday 500 email credits will be credited into Subaccounts’ remaining credit balance.