In my experience, asking questions at the end of your post to encourage comments, doesn’t increase the number of comments you’ll get (but I don’t have stats for this).
I also think that questions at the end take momentum away from the primary aim of your conclusion which is to get your reader to take action and implement your advice.
We’ll dedicate a full week to writing final paragraphs in a few weeks. 🙂
Enchant readers. Woo customers. Win business.