When I was a child my dad would take me to Reds games at Crosley field. He taught me how to score a game. The reasons I kept score cards was to feel more like I was involved in the game (to some extent.) But then after the game I used the scorecard to get autographs on.
At one time I had some great autographs, such as Willie Mays, Lou Brock, Frank Robinson, Bob Gibson, Gus Bell, Vada Pinson.... all on used scorecards. Sadly I can't find any of them today