Hey Jon Hawkins !!! Thanks for the nice article.
I think Answer The Public is absolute SEO gold.
One nice way to get some easy backlinks on Medium is by including links to your original article when you respond to responses on the site.
Since each response is a new story, it is a valid backlink! (While it may not count for a lot, you’ll have full control over the anchor text you use.)
Since it’s polite to respond to responses anyway, I like to get a little SEO benefit from it.