| Clue | Source | Date |
|---|---|---|
| Perk at a restaurant | Universal | 08 Feb 2025 |
| Bonus at a fast-food restaurant, perhaps | The Telegraph Cross Atlantic | 09 Nov 2024 |
| Soda fountain perk | USA Today | 10 Oct 2023 |
| Pop perk | Wall Street Journal | 14 Mar 2019 |
| Pop perk | ||
| Second cup at a diner, e.g | LA Times Daily | 05 Dec 2018 |
| Second cup at a diner, e.g | The Washington Post | 05 Dec 2018 |
| Second cup at a diner, e.g. |