An explanation of why you got a ++ would not likely give you any information on how to improve your posts.

Of course it does. If you make a post and you get upvotes without an explaination, you don't know what was good in your post. Was it funny? Did you get points for being polite? Upvotes because you were the first to answer the question? Because you included a benchmark? Was it because your answer was correct, and the others weren't? If noone tells you why you got upvotes, you don't know what to repeat.

Abigail