Answered question
When all these 25 $ referral credits will be applied to my account (bill) ?
Once they pay the 2nd monthly payment, you will get an email notifying you have earned the referral credit.
Other answers
Sure from the 3rd billing cycle
After your referral pay the second bill
You will get a notification when the referrals unlock. They will then be applied to your next bill.
After the second billing cycle is complete.
Precisely after the second Bill payment.you can expect the next bill with the 25 bonus to your account