Cleaned the misleading post.
I'm not 100% sure how the exp formula works now for GB1, but I can tell you the following.
FW CVs gain exp by shooting down planes, not by scouting. However, I've noticed things that increase your exp gain (NOT TESTED, just noticed by playing the last 3 weeks).
1. Winning increases your exp gain: If you win with 3000 personal credits, you get more than loosing with the same 3000. So in this case, scouting for your team while shooting down planes, can help you in the end if your team wins.
2. Personal Credits increase your exp by jumps: When you shoot down planes, you get personal credits and those seem to be related to your exp by jumps. I'll explain. If you shoot between 0 and 3000, you get roughly the same exp, but if you get to 5000, you seem to have a considerable jump in exp gain... and then another one when you break the 10.000 mark. (not sure the correct numbers, or the amount of jumps... but I've noticed them).
Added to that, before the GB1 and GB2 patch some weeks ago, the pros and cons for those game modes were:  GB1: Less exp, more credits.  GB2: More exp, less credits.
So now you probably get less exp, but you will gain way better credits.
More experienced players will be able to give better information and even correct some of the information I have posted now.
