Do y'all know how to get city cash in Cityville without spending real money?

I see a little show up now and then but I don't know how it gets there.

The game occasionally grants you funds as a reward.

They give you a tiny trickle of game money to help you feel comfortable in spending it. Many players will get used to spending the slow trickle of money and then want to spend real money to get more of it quickly.

It is a very effective monitization technique used by social games. They want your real money, and occasionally giving you virtual money will help loosen your wallet.