[nieve]

I think it should have been prominently labelled as a referral link, but in GilK's defense the URL shortener is Dropbox's own one and that's what all their referral links look like. I don't think you can visually distinguish a referral links from a file sharing link.

[kdommeyer]

That's barely a defense since it just links to dropbox.com, not to an invitation as he claims. It's clearly intended to deceive.