Don’t forget about the Innovations Magazine… it was probably the most tangible thing I felt like I recieved from having a membership and really enjoyed them. Was that done away with too? it was similar DMI reviews but a more accessible.
I don’t think it’s been mentioned, but many countries have a design policy group within the government. It’s hard to say how effective they are for the needs of individual designers, but I think that’s what funds the design council (which is free) and actively promote design to small businesses. Korea has one too.
Another design org in the UK is the MCSD (Member of the Chartered Society of Designers). I think it might not offer much though