Netflix itself actively detects and bans such activity. They use behavioral analytics, login fingerprinting, and rate-throttling to identify credential stuffing attempts. Accounts flagged as compromised are locked until the real owner resets the password.
As these tools gain popularity, the conflict heats up. For every new script on GitHub, security measures evolve: Netflix Open Source Software Center netflix+account+checker+github
But the code itself is only half the story. To actually use the checker, a person also needs (email:password dumps) and proxy lists —which are rarely included directly in the GitHub repo due to legal liability. Netflix itself actively detects and bans such activity