Will the 'Accrued Charges' be charged to my Promotion Referral
If you have any credit in your Linode account, whether that be from a referral or other promotion, you paying in advance, or otherwise, your Linode credit is used first. If you have $25.00 in your account from a referral and you get a $30.00 dedicated Linode, you will only have $5.00 charged to your payment method on file. On the other hand, if you have a $5.00 Linode for the next five months, your referral credit of $25.00 would be charged over that time period of five months, and your payment method won't be used. On the sixth month, you would be charged $5.00 if you still had that Linode, as your account balance would then be $0.00.
Hope this helps.