Most free executors require users to complete "linkvertise" tasks to get a temporary key. JJSploit is often cited for not requiring a key, making it much faster to start.
While the developers (WeAreDevs) claim it is safe, many users and security forums like Malwarebytes flag it as potentially "dodgy" or a virus. It often triggers false positives in antivirus software due to how it "injects" code into games.
Unlike premium executors, JJSploit is free to download and use.