Presumably because the `larger mapping infrastructure` doesn't deem a filterable list of pinball machines to make monetary sense, or fit into their overall prod

Presumably because the `larger mapping infrastructure` doesn't deem a filterable list of pinball machines to make monetary sense, or fit into their overall product without adding clutter. I presume the same is true for the IMDB. They have their own list of things they are interested in, and firearms or cars may not be on that list. It's almost like different people/organizations have different interests and priorities.