It's the price you pay for being able to cancel (or upgrade) at any time
Ridiculously expensive if you are thinking long term ownership, unless you were just looking at one for ... a couple of months. Then.. $170 for the use of a nice computer, and you ship it right back... it could almost make sense then. Almost.
Yeah, that makes absolutely no sense, but places like Rent-A-Center exist, because people make these kind of decisions all the time. The whole car salesmen trap of "Well what monthly payment can you afford?" rather than looking at the total price of the thing.