The "v52.0" designation refers to a specific legacy build known for its stability and comprehensive feature set before later architectural changes were implemented in newer versions.
However, the risk-to-reward ratio is dangerous. You trade $15 for a gray-market key (or $150 for a real one) for the potential of identity theft, ransomware, or a compromised PC. If you are a student, check for free Azure for Education credits. If you are a home user, tolerate the watermark. kms vl all aio v520 smart activation script
If you need "KMS VL ALL AIO v520" because you cannot afford a license, consider these legal alternatives: The "v52