| Merchant | Domain | Country | Program Approval |
|---|---|---|---|
| oreilly.com | Multiple | Open | |
| ostore.com.br | Not Listed | Open | |
| omaymaskin.com | Not Listed | Open | |
| onsclothing.com | Multiple | Open | |
| orgskincare.com | Not Listed | Open | |
| o2.co.uk | Multiple | Open | |
| o2online.de | Multiple | Open | |
| o2.co.uk | Multiple | Open | |
| o2health.nl | Not Listed | Open | |
| o2switch.fr | Not Listed | Open |