Hi,
Just to clarify on the PayPal debit card and cash back. The cash back applies to purchases made using the card (using the card like a charge card, not Pin-based transactions (ATM WITHDRAWALS). The cash back only applies if the party is PayPal Preferred, where the user agrees to advertise PayPal only in the eBay auction listing.
The party is still free to mention other payment options in the winning bidder notifications.However, they can't mention other online payment mechanisms directly in the listing.
Hope that helps!