Have you got a URL I can try? This one worked:
https://txtify.it/www.economist.com/news/finance-and-economi...
https://txtify.it/www.economist.com/news/finance-and-economi...
It also shows up in your example as well. Maybe you don't get bothered by it? :)
Please note: the bug is inconsistent, it pops out inconsistently.
Here's the part: "GET OUR DAILY NEWSLETTER Upgrade your inbox and get our Daily Dispatch and Editor's Picks."
Should be fixed now. We now strip that out: https://github.com/fivefilters/ftr-site-config/blob/master/e...
But I don't consider that a big problem - lots of sites include things like that in their content. It's annoying, but no easy way to identify them all accurately and remove them without custom rules.
liked the project by the way!