30% was overstated for effect. But 5% does not include other party fees associated with processing the pledges. And don't think Kickstarter doesn't out-source most of its 'work' to Amazon and 'the cloud'.
In total, the fixed fee percentages are not trivial, certainly not 30%. But it could very well be 30% at smaller amounts if it is a set fee plus a percentage per pledge.
My point was not to speculate on Kickstarter's exact take but to illuminate the fact that Kickstarter and Amazon are making a great deal of money with their single digit fees for relatively little 'work'. Does not Chris Avellone deserves as much for the very real work he will do, if you consider scriptwriting 'real work'?
To prevent confusion jacobybrandy, that question isn't personally directed at you. I think it was InBlack who was the OP.