Volume for authorized decrypt, not a crack farm
Batch is capacity. The ethics line does not change: permission plus the key. Encrypted and open PDFs in one pile make noisy failures — sort first. After unlock, Merge or Compress as needed.
Free vs queue
One typical file: free Instant. Many files or 100 MB+: Premium. We do not invent a brute-force VPS.
Password per file
If phrases differ, the product still needs the right one for each PDF. A single shared company passphrase is a policy choice, not a requirement.
After the queue
Spot-open two outputs. Keep locked originals if audit says so.