It's still done by a few people. The thing is that as the numbers of fish decline and bait schools decline, trolling is a much more effective way to fish. In the northern Charlottes, many lodges now use downriggers as standard equipment when the fishing slows..and in the "off" years you have to fish deeper and more consistently than before to be successful.
I've power mooched around Vancouver quite a bit in recent years--however the last time was 3 summers ago.., the cut plug herring expense is high, and it does work, but you have to pick the time of year to maximize your success.
People in the "slot" at the Cap Mouth were none too pleased and we got plenty of dirty looks, but it's fun playing a fish with nothing but an 8 oz ball in between you and the fish. The same week we power mooched off Pt. Grey but the fish had moved and we didn't get any that day...even after switching to trolling with our riggers.
For my money,there are just 6 weeks of the year around Vancouver I would power mooch with cut plug and I'd expect the trollers to catch more than me on 90% of the trips unless the fish are in there thick. Last August when the fish were in thick of Pt. Grey, one boat was cut plugging with weights and they got 2 of their 3 Springs on weighted rods. Those are the ideal times to use Cut Plug, it's simple, easy, and in those situations, cut plugging will open the proverbial can of "whoop butt" on trollers.