I have given up trying to unsub from many places, sometimes unsubing doesn't do anything, I generally just mark it as spam now days.
I'm looking at you, LinkedIn and Twitter. I've unsubscribed from about three or four waves of your bullshit. No, I don't care about what I might have "missed on Twitter". I didn't subscribe to this, you spamming fucks.
Personally I give them the benefit of the doubt and try to unsubscribe with ONE click.
There is no good reason to make people click more than once.