This site donates 10 pieces of rice for every correct answer to questions it gives you
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Home | Freerice
https://freerice.com/
https://freerice.com/
So that's on the order of 1,000 questions answered for a pound of rice. If rice is $2/lb. and you're answering one question every five seconds, that's about $1.44/hr.
Maybe just donate some money instead.
If you're about donating yes. If you're about having some short time fun with a (for me) new kind of puzzle to keep flexible in the mind.... This is great as it is.
You can change the category in the menu. They have Japanese and Chinese, as well as other categories.