yes I have but as a friend (member of the forum) is saying, not more than a pizza and a beer monthly.
But you must be careful in the beginning. Better learn the basics of the game or else you're just spend your money here and there without a reason.
Many people saying that they didn't buy any money but they are from countries where you can farm many extra token and boosters.
From where are you ?

* There is no reason to rush, building your facilities earlier