| Merchant | Domain | Country | Program Approval |
|---|---|---|---|
| matteroffact.com | Not Listed | Open | |
| matterhackers.com | Not Listed | Open | |
| matto.fi | Not Listed | Open | |
| mattresscrafters.com.au | Not Listed | Open | |
| mattressfirm.com | Multiple | Open | |
| mattressomni.ca | Not Listed | Open | |
| mattresstopper.com | Not Listed | Open | |
| mattresswarehouse.com | Not Listed | Open | |
| mattressfoundations.com | Not Listed | Open | |
| mattressman.co.uk | Multiple | Open |