For me there's a difference between KofK and say King of Avalon. Mobile games, even the ones that are free to play, are oriented for profit. Kofk really isn't, so I rather donate to kofk (where the site is nice and the community too) than pay god knows how much for some Isolde items for my lord only to make gathering recources for buldings less pain. And have it stop helping me much after I reach a certain level. I value my money, I don't have much and prices can get insane, especially for the boosts that are the most handy
Edit: The most hady or the handiest? ...

The other one sounds off...