Some forms of payment take time to process. Adding a deposit to your account ensures a speedier delivery of your campaign.
For more information on payment processing times, see here: https://coinscribble.com/docs/payment-processing-time/
Unused deposits can be refunded upon request. Refunds will be sent via the same method they were paid in. If the deposit was paid in crypto, the refund can only be paid to the same address from which the original payment was made.
