What percentage of Elsevier documents are published there exclusively but otherwise public domain or freely license. I think part of the problem is discovery.

What percentage of Elsevier documents are published there exclusively but otherwise public domain or freely license. I think part of the problem is discovery. https://getpolarized.io/ https://getpolarized.io/ Polar is an app that people use for PDF and document annotation (supports web content too). I'm shipping cloud support early next week. Anyway, one of the features that's going to come out soon is social document discovery. I'd like to use your friends to discover what PDFs to read and this would bypass the paywall problem.