If there is no added value why do people pay then?
Are you naturally this obtuse, or do you practice at it?
They pay because the content has value--NONE OF WHICH IS ADDED BY ELSEVIER.
Elsevier engages in rent-seeking by locking up the value and then adding nothing to it.
This isn't complicated. There's a reason all of Elsevier's customers hate them. It's the same reason Comcast's customers hate them too--Comcast DOESN'T ADD VALUE to the content they deliver, which they also do not produce. In fact, they substantially reduce the value of the content they deliver with the restrictions they place on it.
Elsevier is the science-publishing equivalent of Comcast. They are middle men who use a legally enforced monopoly to extract money from both producers of research and users of it while giving both sides nothing of value.