[dragonwriter]

Its perfectly realistic terms if:

1) The rewards aren't dependent on project success, or 2) The rewards are dependent on project success, but the project is being Kickstarted to fund something that is prototyped and ready to go into production, and the funding level is set appropriate to pay the production costs for the delivered rewards plus whatever premium the company expects to need to go forward.

Its only unreasonable if the project sets the rewards and funding levels at levels that are unreasonable.

When the project sets the funding target and the offered rewards, its not unreasonable to expect the project to be responsible for actually being able to meet the promised rewards if it meets the funding level it set.

No one forces you to put a project on Kickstarter, or sets the funding target or reward levels for you.