The Open Design Alliance changed the terms of Associate Membership from free to $100 yearly. Former ODA president Evan Yares figures that's wrong, because associate membership agreements were in-perpetuity.
(Associate Members download some -- not all -- ODA libraries for personal use at no cost.)
By his estimate, some 3,000 associate members are being asked to pay up within 30 days or lose membership -- against the terms of the license they originally agreed to. Including, Mr Yares notes, Autodesk apparently.
He details his case and his emails in a lengthy posting at his Evan on Engineering Software blog: Open Design Alliance: What a Mess. And he's proposing that the three thousand launch a class-action suit in Washington State to stop the ODA from unilaterally changing the agreement.