| Merchant | Domain | Country | Program Approval |
|---|---|---|---|
| 1stchoicefertilizer.com | Not Listed | Open | |
| 1stclasshumidors.com | Multiple | Open | |
| 1stclassmed.com | Not Listed | Open | |
| 1stformations.co.uk | Not Listed | Open | |
| 1stincoffee.com | Multiple | Open | |
| 1st-original.ru | Not Listed | Open | |
| 1stdibs.com | Not Listed | Open | |
| 1stopbedrooms.com | Not Listed | Open | |
| 1stoplighting.com | Multiple | Open | |
| 1stpersonguitar.com | Multiple | Open |