AI (think it's AI) responds to customers who reply to opt-in messages with a any response other than "YES" or "NO" in a way that can be interpreted as rude. It does not acknowledge the customer's message, which may include clarifying questions about the opt-in message, other comments related to their deal, etc. instead simply sends back the following: Please respond with only a YES or NO. It is abrupt.
There are several examples, but specifically, the most recent is Christopher Dean