When I was a kid, I played RPGs (AD&D, mostly) a lot, and we all loved the oddball dice. 30 sided die and 100 sided got a lot of use. The 100 sided one was a dimpled ball with some sort of pellets inside (to make it stop rolling faster). I'm not sure how fair it was, but it was fun. There were, at the time, several little books of random/funny things that could happen in the game based on a 30 sided die roll; battle results, random encounters, etc. Published by the dice manufacturer, I presume.

I long ago got rid of all of the books and boxed sets. But, I still carry the little faux leather bag of dice from house to house. Not sure why. Something about the feel of the dice has the strongest memory association with that time and those friends.

I don't really have anything to say about this particular die, but if I still played RPGs, I would find something to use it for. I would have bought it in a heartbeat, as a kid.