The "crack" version implies a patched executable that bypasses license verification. Users search for this for several reasons:

For troubleshooting specific errors like "initialization failed" or "stuck at 99%," check the official MuMu FAQ

Stealing data is highly profitable for cybercriminals who distribute cracked software.

If you are still searching for ways to optimize, here are some alternatives: available from the official site. Optimize your settings within the official app for 120 FPS.

The company frequently offers steep discounts (e.g., up to 70% off) during New Year or holiday sales, bringing down the cost to a few dollars a month.