These promotional packs became available after November 16th, 2018. To boost off season sales all you have to do is buy $10 or so of Topps products to recieve a pack. There are a couple base parallels and autos to be had.
There are also a couple gimmick cards in the set including this Santa card. There's also a Christmas Elf and Turkey to find.
Also included in my pack was this 2019 Topps Series 1 sSilver Pack / Home Run Challenge promo card.