Again I do apologise for going off original subject (improvising) but "commercials" are exactly that. They are commercial money making enterprises which must try to attract lots of customers to make money. It would appear that lots of anglers prefer easy straightforward fishing and if that is their preference then why not? However; although we all want to catch isn't fishing a bit more than just catching?
Peter a lot of commercials will have a specimen lake, a silvers only lake, that also holds large perch and tench.
I am in a club called Newlands in Standlake Oxford, they have 4 waters on the Linear Fisheries complex, which I presume you have heard of. These are gravel pit type waters similar to Linear , whose waters incidentally hols some large tench and silvers.
Two of the waters that Newlands have, the specimen lake and the lagoon are large enough if they were that way inclined to hold power boat meetings on.
The two smaller waters have a good mixed stock of silvers,tench,perch,pile and carp all of varying sizes, The one I mainly fish has an island running the length of it, it is a 40 yard cast to it from one side of the lake and 50yards cast from the other.
The other smaller water is of similar size.
These are not muddy holes in the ground, there are benches dotted around, a picnic table, the grass is cut regularly.And they have a good bailiff team, who advise on set ups if required, all leger and feeder rigs should be free running, and a minimum 18" from float to hook. Like I said the bailiffs are good,approachable and offer advice if asked on how the waters are fishing. I know they are good because I was a bailiff for a club up north for a number of years.
Now.. apart from selling membership cards, they also do day tickets.....So in a way it can be classed as a commercial... but not the way you and others perceive them to be...muddy holes filled with starving carp and 200lb achievable on each visit, that's going off your 4 keepnet post, Keepnets are not allowed on commercials or many club waters except in authorized matches.
Some Rivers and Canals are day ticket....
Are they commercials.? ...Yes because they charge you to fish them. But again no muddy hole or starving carp.