Rolls: Client side or server side?

[DomesticBabylon]

If it was client side, there would have been a mod to guarantee 99 rolls within hours.

Feels like that's exactly what is happening. I don't use mods and am completely unaware of what mods exist, so if they did indeed exist I wouldn't know.
See, I've played rogue trader before and rolled a d100 many many times, so I instinctively know the odds of getting those high rolls. Yet somehow, every time there's one or more people rolling the high 95+