I use it all the time to get around paywalls. Most often, the website will tell you that the link you entered has already been “saved” & then gives you a link to the article. One time, it actually “saved” off the link I put in ... took a while, but then I got the new link.
Epoch has a free subscription, but of course they want your email ... not doing it, nor will I do it for anyone else at this point.