Ein ausgezeichneter Bericht von Richard Poynder:

http://poynder.blogspot.co.uk/2015/06/hefce-elsevier-copy-request-button-and.html

"This is surely the long game publishers are playing: appropriate gold OA in a way that preserves their profits, while simultaneously seek to appropriate green OA in order to control it, and then gradually phase it out, thus ensuring a transition to a pay-to-publish environment that best suits their needs, and at a cost based on their asking price."

Zum Button hier:

http://archiv.twoday.net/search?q=button+eprint