One reason it is behind a pay wall is because it is copyrighted. This is what caused trouble for FR 25 years ago...
My subscription agreement states that I’m allowed to send copies of either three or five articles to friends over some period of time (maybe a year, but it could be the life of the subscription). That was one of my freebies. I may be wrong, but I don’t believe I can even copy more than the limit because they disable the copy function.