I didn't calculate anything this time, Wotzilla did. I only calculated the predictions beforehand (which were place ~8500 or 5300 famepoints to be sure, which turned out to be about right).

Many of the Top 50 clans will donate quite a number of tanks because alot of their members are both in top 6k (even more in top 8k obviously) and have 15+ battles, after all there are 11k tanks to get. The activity required for this campaign made sure that there would be a smaller number of "leeches" compared to previous campaigns that would only have the minimum required battlecount and get the tank without actually earning a bunch of player famepoints.