I know doctors who have (legally) shared medical images with it, because it offers much more storage than other providers and works everywhere in a browser. It

I know doctors who have (legally) shared medical images with it, because it offers much more storage than other providers and works everywhere in a browser. It is also far, far better than the "proper" channels. Similarly, I've received work-related files on it from "official big dog" people in "big companies". It's got a following beyond piracy (but because they don't post links online, you probably haven't heard about it as much).