I'll often include one CTA if it fits with the article, such as asking about their thoughts on a topic.

I like the tiered posts idea, but I wonder if it decreases the chance of someone commenting on an article?

For example, someone reads the post and instead of leaving a comment, they click on the link and it takes them to the next article.

I know it's possible to right-click and open links in tabs if someone is using a computer, but I'm not sure how often people will do that.