| Clue | Source | Date |
|---|---|---|
| Promos based on someone's search history | USA Today | 10 Aug 2025 |
| Pop-ups based on past web visits and purchases | USA Today | 15 Jun 2025 |
| Personalized promos | LA Times Daily | 05 Dec 2022 |
| They're often based on search and purchase histories | The New Yorker | 24 Jun 2019 |