Just as if the whole situation weren't complex enough already, a lot of online "file locker" services deliberately make it difficult to mass-download content -- one common practice, for instance, is to throttle users to one download per IP per hour or so unless they've registered and/or paid. While this is ostensibly to encourage users to register/pay/not download excessively, I can't imagine it makes things any easier for rights holders.
Given the enormous "lost value" claims cited by the content owners, the cost of subscribing to make their takedown tools work faster/better is surely lost in the noise. (Unless they're paying per-file, in which case it might be reasonable to offer a refund for files they download which they confirm infringing status of, but that still encourages them to takedown as much stuff as they can get away with, if not more so)
