Thank you for sharing your findings. As of your number 2 point - I'm pretty sure that money is distributed for surviving winners, but not all surviving winners will get an item. This is from Help page:...
2. The money is spread around the people who find something, not survivors.
If you survive the battle you also have a chance of finding items.
Also, lots of people running around with no weapons attached are not likely to KO anybody, which increases the chance of lots of people surviving....I dont think its a good idea as few people with guns who might joined this battle randomly or just forgot to take their weapon off might ruin it.
In addition as i understand now - damage you did in fort battle has nothing to do with reward you recieve. So i think german people idea that was shown in a movie is a good one as it ensures that everyone can get killed.