Hey
So i noticed some people and confusing Kickstart with a donation project, which it is not.
It is much more like a pre-order with bonuses according with the amount of money you give.
Double fine is making available for minimum of 15 dollars:
The game, The beta, The private community where you will help the game happen in collaboration and the sd documentary.
For 30 dollars:
All of the above plus the game soundtrack and HD documentary
There are other brackets with greater rewards.
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Yes Kickstart is all about supporting what you are passionate about but it is not donating expecting to have nothing in return or having to buy the product again after it is done.
This is much like
http://en.wikipedia.org/wiki/Patronage
of the old times.