What's worst about social media comes not from the platform itself but the advertiser model. Algorithms are a way to drive engagement for advertisers. The longer you stay on the site, the more ads you see. The more ads you see, the more money the platform makes.
On a subscriber model, there's an entirely different incentive. They want you to be happy enough to keep your subscription, of course, but beyond that, they have no particular incentive to keep the load high on their servers.
Science does *not* suffer, did you mean to say? Elsevier does not fund science. Science does not suffer if the pimp is not paid for papers: see arXiv. Services like Elsevier used to be value added; now they are rent-seeking.
Papers written by researchers on publicly funded projects should not be paywalled. Again, see arXiv. Embargoed data from publicly funded research is a nuanced topic, because big projects often consume an entire career, and there have to be rewards sufficient.
Server run by the main developers of the project It is not focused on any particular niche interest - everyone is welcome as long as you follow our code of conduct!