When I was younger, though, it was a different story. If sticker collecting didn’t immediately grab you, Topps tried to lure collectors in with baseball cards printed on the back of the stickers for a few years. I’m not sure how well the experiment worked on a large level, but it did give me extra motivation to buy the packs of stickers/cards.
The sticker cards set was easier to complete than the stickers, provided that you didn’t try to obtain every possible variation. In 1990, there were 67 different sticker back cards, but 328 stickers. The card set was evenly divided between National League (with blue backgrounds) and American League players (with red backgrounds). The final card was a checklist.