In the case of pre-ordering, Celery doesn't make any authorizations/holds upon the creation of the order. We use Stripe to make sure the card is valid and the charge is processed at a later time.

Celery does not store the credit cards and all payment information transferred is encrypted with SSL. The cards are held within Stripe's vault. Each seller uses their own Stripe token.

The chargebacks would affect the seller, since the payments are linked to their Stripe account. It's important that seller is able to actually ship the item if they decide to charge the buyer. Otherwise, they would need to refund or risk getting hit with chargebacks.