There is no evidence of a company using the fact that you've said "yes" at a random point in the conversation as confirmation that you've agreed to their (maybe unheard) pitch, despite variations on that urban legend doing the rounds for years.
I just read in the article and I replied to a comment that has:
I noticed that this often broke the spell and gave people an opening to back out or “wait and ask the wife about it.” As soon as I heard a yes, I said, “Great choice!” and transferred them to confirmation. My manager occasionally came by and reminded me that it was technically illegal to skip my disclosures, but he made commission off my commission, and his tone made it clear that I could do as I pleased as long as I kept putting up numbers.
https://www.snopes.com/fact-check/can-you-hear-me-scam/
https://en.wikipedia.org/wiki/Can_you_hear_me%3F_(alleged_te...