I was paid cash for reffing soccer. The U18 games paid $70 each to two of us, and I often was the only ref there. U18 was pretty gun, it was coed, and the kids MOSTLY reffed themselves. It's interesting when the players drive themselves to the game and there are no parents present. There were times when I'd call an out of bounds for the red team and they'd all look at me seeing I was far away and point the other way, and I say go with it. The girl players were often really good, they had to have one touch across midfield. On occasion, two guys would kind of get into it, and I'd yell at them, WHAT ARE YOU DOING??? and they'd shake hands and stop.
I loved it, usually a nice day, $140 in cash, and some exercise and no complaints. U11 was the worst, the coaches didn't know the rules often as not. In soccer, if the ball doesn't cross the OB line, it's in bounds, but if it hooks and goes OB in the air and comes back in, it's out of bounds.