Actually, they destroyed the non-auto metal cards. They never said they would destroy the leftover auto cards.
However, they did say that they would never offer them for sale at a price lower than their initial prices on eBay. Since this promotion is not technically selling the cards they seem to be in the clear on that one.
2017 Bowman Breaks
dthimesch 10 Jumbo Caser: 26-30-67-177-195-198-224-226
rcspur 15 Hoby/Jumbo Caser: 63-64-74-84-92-93-131-163-195-213-239-247-251-279-292-