After long-time suspicion and finally some testing, I've discovered what could be a potentially serious bug in GPP's stage credit system.
The stage credits for a kill are only counted for the person who got the killing blow.
Per example, say Meisseli shot a granger 9 times with a rifle, and I got the final shot on it.
The team would only gain 24 credits for that kill, instead of the 240 that the granger would have been worth if Meisseli were on her own.
Is this an intentional function, or is it an oversight?
I personally do not see this as being intentionally implemented, as it is a disincentive to teamwork.
The more people you work with, the less it is worth to your team.