This is primarily my gripe. People treat Kickstarter like they're investing in a product, but real investors share in profits.
This isn't necessarily a good thing. When I split a pizza with my friends do we start by raising capital so an investor can buy the pizza and sell us slices at a markup? No, we ask "who wants pizza". Kickstarter is the same principle on a larger scale. "Who wants OGRE?"
What he's trying to say is:
What if the pizza never arrives?
I don't think that works though - if the pizza/game/product never arrives, then it doesn't matter if you've got a stake in the product - a donor would make $0, and someone with a share would also make $0 - they're both screwed.
Its closer to... hmm... we all want pizza, so we all pitch in for a pizza oven. The person who gets the oven gives us all one pizza, then starts making more pizza and selling it to other people, making money off of it. In this case, a donor gets a pizza for their cash, while an invesor would get a pizza, then a return on their investment in the oven. Now, are people satisfied? I think it depends on how much we paid for that oven.
If I'm a donor throwing in $100, and all I get is a small cheese pizza, I'm going to be pissed. If all it cost me was $5, and I get a large pizza with all the toppings, I've gotten a deal.
For Investors, it doesn't necessarily work that way - they might be willing to pay $100 for a small cheese pizza, if they know they'll have a steady revenue stream.
Another point - how much of a profit share are you really going to get? For people investing the minimum (like, say, for one of the big computer games in development) They're throwing $10 or $15 towards a multi-million dollar project - they've got, maybe, a 0.001% stake in the product - you're never going to see anything worthwhile back from that.