I've been a game designer for around 15 years. There's a lot of bad information out there, especially when it comes to free to play games. I came across this site fairly recently and I have to say it's one of the best resources for aspiring and seasoned game designers alike.
https://www.deconstructoroffun.com/blog//2015/02/simcity-buildit-nice-town-but-would-you.html
You're welcome!