I agree with you that some people; maybe 50% fish just for the "sport" of it and to just get out on the water and enjoy the sights sounds and smells of Saltwater fishing, and if we catch a some fish, that's a BONUS!!! But have seen guys at Marinas. keeping fish to SELL. In order to pay the costs of their boats, like Dockage, Fuel, Boat payment, Insurance and don't forget equipment like Rods & Reels,(line), Lures, and other terminal tackle and boating Equipment. And seems each year I see more an more of guys doing that. Seen two brothers make several trips with "Barrels" of Bluefish, to sell at their Bodega. They had a big meat Grinder, to grind up their Bunker that they catch by the Barrel also. They just sit at their "Hot" spot and chum away all day, catching BLUES and BASS for selling with 50-60 lb test. They don't even try to remove the hooks from the fishes mouths while fishing, takes to much time, they just tie another Hook with wire leader on and back to action. Later they might retrive the wire leadered hooks!! What an operation!!!