I considered a one-off $12 fee a good trade off.
Will AARP send 25-50 cents of that to some lib cause? Likely.
But I use the Post Office…
Sometimes Amazon
Sometimes Walmart
ETC
And we know they support libs bigly…
They'll probably spend a hell of a lot more than that on mailings to you to get to to renew. If you don't mind the junkmail, you'll probably end up costing them money in the long run.