| Merchant | Domain | Country | Program Approval |
|---|---|---|---|
| getcastle.com | Not Listed | Open | |
| castleheaters.co.uk | Not Listed | Open | |
| castlebaths.com | Multiple | Open | |
| castlebeard.com | Not Listed | Open | |
| castlegatelights.co.uk | Multiple | Open | |
| castleleslie.com | Not Listed | Open | |
| castlery.com | Not Listed | Open | |
| castlesandcrowns.com | Not Listed | Open | |
| castmagic.io | Not Listed | Open | |
| castmenow.co | Not Listed | Open |