I haven't seen anyone playing a real game of marbles for a long time. When I was a lot younger, playing marbles "for keeps" was a big deal. We would play at recess and lunch time at school. I was never very good at the game and lost quite a few marbles, but it was fun anyway. Today, unless an activity has educational value or is an organized sport, or is online, there isn't much interest among the children or their parents. These marbles probably are used in some other game as game pieces unrelated to their existence as marbles.