From the Open Library of Humanities blog:

The Open Library of Humanities today celebrates its 5th anniversary since we launched our platform on 28th September 2015 with only 7 journals and 99 supporting institutions. Five years on, our sustainable business model has attracted nearly 300 supporting institutions, proving the success of its pioneering non-classical economic model, and enabling us to establish a thriving platform of 28 peer-reviewed journals.

In many ways OLH, and its chief scholar-visionary Martin Eve, have pioneered the crucial third-way library-funding model. Cheers!