Not about sales data, per this article, but bibliographic metadata. Check out POSI, the Principles for Open Scholarly Infrastructure: https://openscholarlyinfr

Not about sales data, per this article, but bibliographic metadata. Check out POSI, the Principles for Open Scholarly Infrastructure: https://openscholarlyinfrastructure.org/ https://openscholarlyinfrastructure.org/ There are people dedicated to open metadata and open systems to work with it. https://openscholarlyinfrastructure.org/posse/ https://openscholarlyinfrastructure.org/posse/ (I work at Crossref)