A nice idea to disrupt the scientific publishing scene. One problem with your idea. I don't know if you have an understanding of the process of publishing a paper? But every researcher publishes his or her paper through a journal. These journals have panels of reviewers who check them and after that the publisher publishes them in the journal (or not). Getting your paper published in respected journals reflects on your status as a researcher. Most of the journals are owned by some big companies who put them behind a paywall.
So you can try to create a platform for paper publishing at a low cost. But researchers don't get the peer reviews they normally get and the publicity they get in a "big" journal. Uploading them to your platform as a secondary platform would not be allowed by the journals they publish to. So that's the flaw in your plan.
So you can try to create a platform for paper publishing at a low cost. But researchers don't get the peer reviews they normally get and the publicity they get in a "big" journal. Uploading them to your platform as a secondary platform would not be allowed by the journals they publish to. So that's the flaw in your plan.