From Google’s English: “Open Access (OA) has nothing to do with publishing suddenly becoming free. There are no volunteers doing slave service. If the publication is to have quality, it has to be edited and proofread, it has to be set and provided with illustrations, etc., just as it used to be. The costs only shift, but have to be paid for. The Max Planck Digital Library (MPDL) has an interesting financing model: It assumes that one third of the costs will be paid by the MPDL, one third by the publisher and one third by the author. The publisher can pursue a double strategy by offering the online publications in OA mode, but at the same time producing print copies that are subject to a fee. Such are still wanted by some institutions and private individuals. …
If you, as a non-institutional author, want to publish your contribution OA, either the publisher has to bear all the costs or you share them with the publisher. In this respect, OA is window dressing….”