The shared file is not nulled or cracked; it’s a 100% genuine GPL file, and you can use this GPL file on unlimited websites.
Divi Rocket was built from the ground up and fine-tuned specifically for speeding up the Divi Theme and has a number of features not available in any other caching plugin on the market. Since Divi Rocket was built specifically for Divi, we have optimized user interface to be as easy to use and intuitive as the Divi theme itself. Divi Rocket’s robust set of speed enhancing features include: Divi-aware server-side caching, Divi section controlled lazy loading, browser caching, database optimization.