| Merchant | Domain | Country | Program Approval |
|---|---|---|---|
| stampaestampe.it | Not Listed | Open | |
| stamped.io | Not Listed | Open | |
| stampezee.com | Not Listed | Open | |
| stampington.com | Not Listed | Open | |
| stampington.com | Not Listed | Open | |
| stamprints.com | Not Listed | Open | |
| stamps.com | Multiple | Open | |
| stampsmarketplace.com | Not Listed | Open | |
| stamps.com | Not Listed | Open | |
| stamps4u.co.uk | Not Listed | Open |