Funny thing is, I used to (and still sometime do) host on a webserver with HDD storage. The users using such downloaders were DoSing themselves and got less than a tenth of a sequential download.
(After I limited connections to one per IP address, 90% of the problems went away. After I started blackholing users ignoring 503 responses, the remaining 10% were solved. I get the occasional “I didn't knooow, please give me access again” email now and then.)