There is a case to be made that this should count as predation. The plant in the article is less ambiguous: they detected a digestive enzyme in the sticky stal

There is a case to be made that this should count as predation. The plant in the article is less ambiguous: they detected a digestive enzyme in the sticky stalks which is common to other carnivorous plants, and means the plant digests the insects directly. A bramble consumes unlucky mammals with the help of mycorrhisae in the soil, rather doing so directly. Is this more like the bacteria which help ruminants digest cellulose (no one would say that cows don't eat grass!) or is it more like saying that vegans are carnivores because organic fertilizers have blood and fish meal in them?