"Sounds analogous to the parcelling of bad risk loans that led to the 2008 financial meltdown."
By and large the selling of "good" data is analogous to that. If you buy a washing machine and get sold on as someone likely to buy washing machines the buyer is getting a worthless product. Certainly I've dealt with a car dealer who believes that if I buy a brand new car I'm in the market to buy another a couple of months later.
Ironically junk data is likely to be better: If you get sold on as someone likely to buy a washing machine because you bought a pair of shoes at least there's zero correlation rather than a negative one.