The reason is much simpler, Amazon is correctly optimizing for the person who buys like 10 scooters. This doesn’t sound rational but it’s the same principles as video game IAP. God rolls a 100 sided dice and if it’s a 1 or a 2, you’re born someone who just buys an absolutely ridiculous amount of stuff. These people are rare but the system is not wrong.
Sounds like the argument that social media is basically abusing mental illnesses and people with impulsive spending behaviors. Many of the "whales" in online gaming, gambling, shopping, etc. are people who YOLO their future away due to underlying illnesses, and the MINT people abuse it while telling themselves it's creating value for the customer.