Exept that to have your article published, you have signed a "Consent to publish form" and you are not allowed to distribute for free your work, unless you illegally share it and are object to pursue from your publisher. The "100%" that goes to the "Publisher", is to pay the editorial assitant who reviewed your article full of typos, the XML operator who makes your article readable on every device and all the other employees you are not even aware are necessary to run a Scientic journal, recognized by your peers, distributed wordlwide, unlike your little personal data.
Free life hack for research.