I presume Google Mariner is using the digitized behavior of googlers searching for products, analytics from shopping websites (I would use it), even ad interact

I presume Google Mariner is using the digitized behavior of googlers searching for products, analytics from shopping websites (I would use it), even ad interactions (why not?). If it works, boom, lots of unproductive stale data turned into a potential product (if someone builds this, I want 5%). The problem is: that data has a lot of users under the influence of dark patterns. People shopping in stupid ways, falling for tricks. They probably know this and improved search against some of these patterns in the past. But it's not perfect, right? Search isn't. Large models fall for tricks all the time, you have to assume the other way around. They will fail, and you can reduce that failure rate, but never zero it.