This post reminded me to cancel before my signup offer expires, so I tried via a chat agent. They claimed that they were having technical issues and told me to

This post reminded me to cancel before my signup offer expires, so I tried via a chat agent. They claimed that they were having technical issues and told me to contact Sirius customer service again in 2 hours. I said that the “technical issues” were a lie, and that they can cancel now. All of a sudden they were able to cancel for me without technical difficulty, but only after refusing one more promotion. It looks like they use sentiment analysis to assess whether they can use poor excuses to hassle you out of cancelling.