No, its not processed or any thing.
What you see during startup , 99999+ coins is just a placeholder.
Getting a hack that works with Serverside is really low.
However, it varies on how the devs code the game.
Take for example Need for Speed World (Online Racing).
Coders found a way to tampered with the client and lets you enable to buy "Extra car slots".
And buying car slot costs $$ (150 Boost = AC in GRP).