OK, so I have bought a ton of 2017 Topps and Bowman packs, boxes, and so forth. A TON. What is it with these older cards randomly inserted wit "Rediscover Topps" stamped on them? Bowman has some with the 7oth year logo stamped on them, again older cards. Are these part of a subset? Why can I not find a listing? Any help is appreciated.