I'm thinking of bidding on a freelance editing job through a freelance job website. The employer wants people to agree to a bonus/penalty pay deal: You get extra money for finishing the work early, and lose money if you deliver late.
I've never heard of this before. Is this standard practice? I have no problem meeting deadlines, but I don't know whether some of these projects are deliberately set up to make you fail — like ghostwriting a book in two days, or something close to impossible.