Simple botting question

Hi, I got 2-3 questions on my mind and im kinda looking for simple awnser (That im sure you could awnser)

Ive been looking around the internet (Rsbots.net / Nexus / Ibot / OEM Bots.com / RSbotting / Auto fighter)
And i was wondering what the hell is the difference between them ?

Ive already bought 2 scripts @ Rsbots.net (Auth code) and its works 100% well with update and everything.

My question is : Why buy auth code when people offer their free script/code on forum.
Is there any difference ? (Update frequency ?)

And what is authentification code and how its works ? Thanks for info.

 

There is no difference other than the name basically.
Those are just retailers. Only place I know that sells directly from the scripter is Perfecticus/rsbotting.com

 

When people offer paid auth codes on websites, they will be banned soon for multiple usages.
Free scripts from powerbot are more likely to get banned, but i use them a lot.
And like other guy said, rsbotting is the original retailer for a lot of them.