So a complete version of your original comment would be, per these examples, “I am curious about who sponsored it”? Because my original reply was a response to the implied question: it says who sponsored it in the article, so you can read it and find out. If my inference was incorrect, please clarify. That’s why I recommended using complete, unambiguous sentences in the first place.
Well. Allow me to retort: https://english.stackexchange.com/questions/158607/is-curious-if-improper-to-use-compared-to-alternatives-such-as-curious-as-to
Yes, that supports what I was saying.
Says the exact opposite. Keep reading.
I read the whole thing. I didn’t see any examples of “it is curious”, only “I am curious”.
You’re really making me work for it when you could just read it and back off:
I’m curious whether other people feel like I do.
“Curious,” by the way, has a few other variants:
I’m curious if other people feel like I do.
I’m curious as to whether other people feel like I do.
I’m curious about whether people feel like I do.
To directly answer your question:
However, is it actually improper or logically incorrect?
No, it is not improper or logically incorrect. Which of these is more appropriate is a matter of personal and regional preferences.
So a complete version of your original comment would be, per these examples, “I am curious about who sponsored it”? Because my original reply was a response to the implied question: it says who sponsored it in the article, so you can read it and find out. If my inference was incorrect, please clarify. That’s why I recommended using complete, unambiguous sentences in the first place.
Stop drinking. Read instead.