These are not real cards . They cannot be used for actual purchases and will fail any real-time bank authorization (3D Secure, etc.).
The search site:pastebin.com +maestro reveals active malicious use of the Pastebin platform by a low-sophistication threat actor (or group) using the "Maestro" brand for DDoS bots and credential leaks. Immediate blocking of the identified IOCs is recommended. Continuous monitoring of new pastes containing "maestro" should be implemented for the next 30 days.
Highly accessible; you simply copy the script or the pre-generated list. Most versions include CVV and expiry date placeholders.