Thanks for the comment Dmitrij. We’ve actually been working on something similar this week actually. Not so much “read more”, but “load more news”.
The sample size wasn’t great, but here are the click rates. “MORE” 0.51%,
“MORE NEWS 0.58%, “MORE ARTICLES” 0.10%. As you can see nothing conclusive. We’ll be looking into it further.
Hope that (kind of) helps, I know it doesn’t directly answer your question.