You can make payment to a Market either via PayPal or Credit Card conducted via Stripe.
For Marketplace Purchases
PayPal payments are protected under PayPal's purchasing policy. You have 180 days in the event of a dispute to raise it with PayPal.
Credit Card payments are facilitated via Stripe.
For Drop Sales Purchases
All payments can only be made via Credit Card for these types of sales, PayPal is not available for these sales.