It does appear so. I'm somewhat baffled by the whole thing, to be honest. My own plants produce extra fluid when they catch a larger insect such as a moth, and it is also known that the plants possess sessile glands that are able to readily absorb pre-digested fluid. I have read that fungi may play a role in digestion (I think that D'Amato, for example, mentions this possibility), but I don't know of any proof for this theory. Perhaps someone has fed some seedlings and deprived others of food and compared the growth rates?
Interestingly, Hartmeyer, on his website, refers to some very interesting tests that were done on Roridula and its resident Pameridea bugs. In these experiments, fruit flies were fed food containing nitrogen that was tagged in a particular way so it could be readily identified. The fruit flies were then placed on the Roridula plants. The bugs, which are able to move around the Roridual plants without being caught, sucked the captured fruit flies dry, and then deposited droppings on the Roridula plants' leaves. The scientists who conducted the experiment were able do demonstrate that the tagged nitrogen had made its way into the Roridula plants, presumably via the Pameridea bugs. Therefore, it is arguable that Roridula is carnivorous; it certainly traps prey and is able to benefit from its ability to do this. I think that B. liniflora probably works in exactly the same way, although I am puzzled by the fact that it does appear to produce juices of some sort when fed.
I know, I know, I should have kept it all organized. The thing is, I'm always all about the more natural, crowded look. This isn't the point though...
. Don't try feeding it ants, for me ants just never get stuck 
