Just an idea but I'd like to see players penalized (by subtracting contest progress points) for every unit of saved stamina, every saved diamond, and every saved scrap before the contest start.
The reason is that the contests are intended to build revenue, so if you are hoarding resources prior to the contest then you are gaming the system and going against the spirit of the contest. Only pure spending should be allowed and rewarded to get the prizes.
Right now I have to spend about $20 to get into 5% rankings for the weekend contests, but that is obviously not enough Revenue. We should have to spend between $100 and $150 each weekends to get to the 5% skin. It just seems more reasonable and logical to me. And if we start giving Gree a lot more money, they can develop More Heroes each month, which would be very cool.
Thank you for considering my idea and have a very nice day!