Turning reddit posts into blog posts - duplication penalty?

I have started posting on some niche subreddits on another account, and am contemplating ways to build this into my SEO strategy. My comments are typically briefs answers and I will link to an article on my website if related.

My current thought is that, with an OP's permission, to start a "Q&A" portion on my website and essentially copy and paste the initial question and then my follow-up answer.

Looking for some guidance from "they-who-know-more-than-I". Is this likely to hurt more than it helps? Further, have there been any related reddit SEO strategies that you have used that have been effective?

Thanks for your time.