[_delirium]

That's not that uncommon a pricing model in the arts even pre-Kickstarter. You've got the $10 CD, the $25 limited-edition CD with bonus tracks, the $100 super-limited leatherbound box set signed by the artist, etc.

[guard-of-terra]

I'll argue the incentive is different for goods that already exist.

Also kickstarter takes this to a radical new level with tens of price tiers compared to two or three.