Not a penny. In fact it costs me money. Petrol to the jobs etc. and when I was a member of brass band , I paid weekly subs too.
As Andy mentioned, the top bands get expenses and top of the range instruments. Plus overseas tours etc. all paid for. I know a guy that plays for Black Dyke and he drives 200 miles EACH way twice a week to rehearse. Plus extras for sectionals and contests etc. He's a Maths teacher by day. That is the sort of dedication required to play with the big boys.