it's also possible that you recruited cheater, feeder cities who's only purpose is to feed kp to other cities or earn diamonds for another city by using wishing wells and these cities aren't interested in growing themselves. they could be there to grow other cities that aren't even in your fellowship.
don't you find it strange that nobody in a large fellowship has a single wonder besides you? i haven't even looked at Felon-whatever world but after looking at the stats, it seems very strange that people are earning tournament rewards and don't have a wonder to spend them on.
i could be wrong about this but i've seen this happen many times before. this is a consequence of Inno's policy of turning a blind eye towards cheaters. people who play fairly join or form fellowships that are dysfunctional because certain players don't care much about the city they are using to feed another one. then the people who do play fairly can become discouraged by the lack of help from their teammates, sometimes causing them to quit or at least become lost when trying to learn the game.
using wishing wells to earn diamonds for another city that is attached to that account is probably within the rules from what i can tell. feeding all of your kp to another city isn't but both of these actions will hurt the development of a fellowship.
note-i'm not accusing you of cheating. i'm suggesting that cheaters may have joined your fellowship and are hurting your team's activity, growth, and trading.