> One week. Three senior engineers. $10,000. We commit to a reduction target up front, and you pay in proportion to how much of it we hit.

Commitment ain't what it used to be.

15 years ago it was always fix price for undefined amount of work, 10 years ago it was agile where client was promissed something but paid per day.

I prefer the old way of doing things: do the offer for free, commit to a task, and accept, that it might not be a success after all. I'd just loose a week of work, but probably learn a lot.