I dunno, I feel the opposite. I think that buying something just to "support" it is all fine and dandy if you want to give them money, but it creates inaccurate

I dunno, I feel the opposite. I think that buying something just to "support" it is all fine and dandy if you want to give them money, but it creates inaccurate expectations of long term idea viability. If 100 people purchase something because they like the idea and only 5 purchase because they want the product the next time it happens and that desire to validate the idea isn't there it will flop. There is a limit on the amount of times something can succeed based on good will, eventually it has to meet a need or provide value. The Humble Bundle is already a very powerful brand, this will succeed without the need for good will, although I do think "good will" purchases are a noticeable portion of Humble Bundle sales, but not a significant amount.