I personally think EA's going about it wrong. They're (seemingly) hoping for massive donut purchases of eggs from a smaller percentage of players to get everything.
As they've got a cap before getting all prizes (eg. all characters/buildings should be earned after 80/81 spins per box colour), if I got almost 60-70 spins per colour, I'd be inclined to drop donuts if I knew I'd only be dropping a maximum amount with a guarantee of getting the prizes.
They value larger payments from less players - I think that more players putting in a lesser amount of donuts would be better for their wallet, as well as generating better player goodwill. Not to mention that once you start going premium, it's a slippery slope (and all to EA's wallet's benefit).
