Competition is healthy. Sadly its 1 sided on our server aswell, basically the great ninja war is just like this : log in, half doesn't get to fight. Claim prices.
Way we do it is : everyone who participated 5 rounds gets a pack, people who got 1 last week dont get one this time around.
I just hope some cross server ranked battle/group battles get added so that there is some more competition. With the pace servers are being launched its only a matter of time untill some servers start running empty with only 3-4 active groups maybe.