Walleye and Bass tournaments are big money in the US and less so in eastern Canada but not too shabby. Contests typically won by ounces difference. Live wells in the boats. Live wells at weigh in. Live wells in release pontoon boats. Fished tourneys in the 80's pro bass circuit Ontario. There were cheaters. They got caught. No publicity the way sponsors wanted. Those guys just never showed up again. Got off way too easy. Great camaraderie, beer tents, small town hotel bars. All tainted because of the sh*t heads out there and BTW ... they are everywhere in every activity and the real pro thieves can be seen daily very visible....wearing suits and ties on city streets.