Free script or paid? The difference that actually exists
Being free is not the problem. The problem is that nobody is responsible for it.
A free script lacks one thing a paid one has: someone who answers. When the game updates, the free build either never gets fixed or gets fixed weeks later - and in that gap it is just you and the new build.
The second problem is support. If it will not run on your machine, a paid tool has a support channel you can write to. With a free one, the only fix is digging through scattered forum posts.
The third point matters more than both: free builds are often copied from an old release. Code nobody is responsible for can do anything on your machine.
That does not make paid automatically good - but it does mean someone is accountable. For a tool that runs at kernel level, that difference is enough.