Actually, that's orthogonal to the intent of Kickstarter, and the reason for these new policies. Watch in the future as they continue to implement policies that promote the idea of donations rather than "pre-order."
You're right, it's not an investment: you don't get a stake on the outcome of the project. However, it is closer to charity than you may want to think.
That you may get a "reward" for your pledge should be seen in the same light as contributing to your local Public Radio station and receiving a tote-bag in return. You don't get stock on NPR, and you didn't pre-order the news.
Moreover, if the Public Radio station decides to provide a copy of the newest show as a reward for your pledge, would you all of a sudden consider that now a pre-order on such show, or still just a donation?
-dZ.