Skyline claims they use no chocolate, so does Gold Star, but really you wouldn't know if they added some. It's only "chili" in the broadest definition of the term. One can iamgine taking an Italian into pizza hut and ordering a supreme. He might like it, but say it's not really pizza.
Either way, if you're ever in Cincy, and don't try it, you're really not missing much except an unusual experience. You wouldn't necessarily like it. The same is true with the Varsity down here, it's kind of an experience, but it's not all that great at all. When I go back to Cincy, I try and have some of their chili "for old time sake" etc.
The other Cincy "thing" is White Castle, which serves what are called "sliders". They aren't very good either.
I do think it's nice for a town to have some "local dishes" whether they are that good or not.
We attended a concert when we were back, that was the main reason for going, and had some time with the conductor and his wife after that was neat. He has some good stories. The travel schedule these folks have is ridiculous, I guess they fly up front but still ...
