Actually IEEE is a spamming organisation

Really! I used to be in Comsoc in IEEE. However paying over $100 every year for nothing kind of did not square with me so I left. But since then I receive 2-5 emails per day from then with ads for different things. And they have like a zillion categories, so pressing unsubscribe more or less just stops the email that was just received, nothing else.
Seriously IEEE! You behave quite similar to a spamming venture. SHAPE UP!