Some drop lists contain only domain names that follow the domain name deletion process (where the domain name enters the REGISTRAR-HOLD status, followed by REDEMPTIONPERIOD, and PENDINGDELETE), some contain only pre-release domain names, and some contain both pre-release and regular domain names.
Some drop lists comprise a combination of domain names that have completed the deletion process (entering REGISTRAR-HOLD, then REDEMPTIONPERIOD, and finally PENDINGDELETE) and those that are pre-release or regular domain names.