Stea1thtrooper8 said:
in your experience
Well, I've never tried crowd sourcing from the developer's standpoint, but still found this an interesting thought experiment.
It's an uncertain thing, the choice of chipping in.
Often it's the promise - being teased with stuff that scratch just the right itch. (this means there are no alternatives in the stores) combined with the likelihood that it'll get postponed indefinitely, that makes the choice difficult.
So from your perspective, that makes the main disadvantage that even though people like what they see, they might be too scared to join. I think this can be alleviated by showing off a near-finished prototype or presenting a competent team. Progress and credentials can definitely be reassuring for the crowd.
The advantages are that you get to gather and interact with the community (be careful about this) and getting money upfront without having a finished game - so perhaps you can take some weeks off to dedicate to development, sub-contract an artist or such, for that money.