Free opener
The first banner-style concept is free and carries no payment obligation.
Refund policy
Pay-after-delivery keeps the risk low.
The launch flow is designed so the buyer reviews the finished ads before paying. If the batch is not delivered, there is no launch-batch payment to refund.
Before payment
The buyer reviews the finished 5-ad batch before the $500 launch payment is due.
After payment
Any post-payment concern should be handled directly against the agreed deliverables and revision terms for the engagement.