The trick to removing yourself from ActionNetwork's mailings is in how you phrase it.
If you ask to be "removed from mailing lists", they will tell you that the only way to do so is to click the "Unsubscribe" link in the footer, and that there's no way to prevent yourself from being added to new lists.
But if you're persistent, they'll admit that there's another option: you can ask to be added to the "global block list", which they'll warn you is irrevocable. (I'm sure there's no good reason for the irrevocability, except to make people think twice about taking that option.)
Like you, I have stopped donating to candidates who use them.
If you ask to be "removed from mailing lists", they will tell you that the only way to do so is to click the "Unsubscribe" link in the footer, and that there's no way to prevent yourself from being added to new lists.
But if you're persistent, they'll admit that there's another option: you can ask to be added to the "global block list", which they'll warn you is irrevocable. (I'm sure there's no good reason for the irrevocability, except to make people think twice about taking that option.)
Like you, I have stopped donating to candidates who use them.