McMemberships, Dismemberment and MC Escher

To buy into "memberships" with fleet publishers now, pre-emptively, and at current prices, while the money is still tied up in subscriptions (which cannot, of course, be cancelled in advance, before OA) is both penny- and pound-foolish -- and especially if a "member" institution has not even first mandated Green OA self-archiving for all of its refereed research output...