Buyer makes a purchase,  ebay sells me a delivery label. In the meantime, the buyer has requested a cancellation. I oblige and make a refund. Ebay will not refund the unused delivery label however, which I paid for. As a result payment balance is negative and payouts are on hold. 

Offering free delivery now  comes with this risk, it would appear.

Ebay is a constantly changing maze of pitfalls.

Automated "A.I" help seems deliberately dumb and unhelpful...something went wrong, it repeats.