A formal co-worker of mine who once worked at Amazon told me that they had to solve similar problems when Alexa ads was on Super Bowl.
It's a classic case we have to tell apart human and machines -- inverse CAPTCHA.
BTW my quick get-rich idea for you all.
1. Publish a book and price it at $1,000; call it "How to Get Rich using AI"
2. Get on a national TV
3. Say "Siri, Alexa, Google, buy the book"How to Get Rich using AI"
fun fact: tijdens de keynote hakt Apple een stukje 3k, 4k, 5k en 6kHz eruit wanneer ze "Siri" zeggen, zodat niet iedereens HomePods terug beginnen te praten 🗣️🚫