I hate to write this one, for fear the spammers will learn from it and send more. But really ...
I'm getting spam from a particular sender. Same old thing. But this one looks sufficient like a phish .. well, our corporate anti-phish technology is triggering on it and removing the URLs. Which means I can't use the legally-mandated URL to opt-out. So I get more spam from them.
It kinda sucks. Protection implemented for the best of reasons, to block phishing, is making spam more prevalent.
Damned if you do.