I enjoy watching Judge Judy every now and then. I recently did a google search for her and found out the following:
Each person gets paid $100/day to appear their case. If the defendant loses, the production pays up to $5000 to the plaintiff, rather than paying the judgement themselves. Both air and hotel are also paid for the plaintiff/defendant to appear.
Judge Wapner from the old People's Court has critized Judge Judy's style and thinks she is rude. Surprising.
No tickets are given to anyone who wants to watch her show unfortunately. All people in the background are extras.
Also, she makes $30 million annually.