> "Open Access" would definitely mean more access to articles but at what costs?
This is only for what private publishers like Elsevier call "open access". Reputable publishers like LIPIcs (in computer science) charge 60 EUR per article. Besides, they charge this for all articles (i.e., there is no option to publish closed-access), so they do not sell subscriptions, hence there is no double payment.
Oops, right. I thought the parent comment referred to "double dipping" for hybrid journals (those that have both open-access and closed-access articles): where research institutes pay once for "open-access article processing charges" (to publish) and once more for subscriptions (to read the articles that are closed-access).
Of course, all of this is in addition to the intrinsic cost of doing the research.
This is only for what private publishers like Elsevier call "open access". Reputable publishers like LIPIcs (in computer science) charge 60 EUR per article. Besides, they charge this for all articles (i.e., there is no option to publish closed-access), so they do not sell subscriptions, hence there is no double payment.