Lots of non-carp anglers and specialists talk the talk but don't walk the walk when it comes to "silvers". If a silvers only pond/lake exists on a match type commie, you can pretty much guarantee that it'll be the easiest pond to get a peg on. I've known of more traditional day ticket waters that have been so poorly attended and sometimes abused, that the owners have either stocked carp or angling has ceased. I'm a member of a (very deliberately) mixed fishery syndicate (it was pretty much a clean slate to start). Despite having some big pike, tench and bream (and perch in the past), for the area, with unrealised potential for big roach and rudd too, many coarse anglers baulk at the cost in a way that carpers and pikers simply don't. The result is that carpers and, to a lesser extent, pikers join. The carpers tend not to be too happy when fish other than carp are stocked. If it were all about the money, there's little doubt it would end up carp only. With anyone other than the bloke running it, or a couple of other long term members with the same angling philosophy, it would be carp only now.
It's a similar story on the local rivers. People tend to want barbel and big chub. If they aren't present, the numbers fishing are likely to be relatively low. The exceptions are likely to be relatively easy access venues ideally suited to matches. The river match scene somehow managed to keep a core of die hards that didn't jump ship with the rise of commercials. The snag being that their average age is increasing year on year and their numbers slowly dwindling.