The NYT was the worst. Had to call them on the phone. The guy I was talking to offered progressively better deals, until he basically offered me a year for next to nothing. I was angry at that point and determined to cancel, and said "No, JUST CANCEL" and he laughed out loud at me. Instant, permanent never-a-NYT-customer again.
I often wonder how these companies predict the expected permanent loss of customers over time due to their tactics and factor that against the expected gain of wearing people down until they just keep paying.