Personally I just closed the tab when the SUBSCRIBE TO OUR NEWSLETTER dialog obscured the article. I didn't expect to get much value from the content anyways so can't be bothered to deal with their crap.
There is also a cool site that aggregates custom lists and allows you to search for specific filter-lists and narrow down choices by using filters on top. You can then subscribe to them directly - most are hosted on github. Just keep in mind some of them haven't been updated in years - you can preview them, and check their last update - in most of cases anyway. https://filterlists.com/
BTW there are filters specifically designed to remove newsletter-signup messages, popups, popunders, as well as general "annoyances" :)
there is also this you can enable with 1 click if you've got ublock already: https://github.com/yourduskquibbles/webannoyances