It's a good idea, but you have to consider the implications of unfulfilled promises. This is always a issue on fundraising platform.
Another issue would be what will happen with the funds for projects that didn't reach the goal? Stretch goals will be allowed?
But here is my main suggestion:
With all this discussion happening with @sbdpotato stuff, why use steem, and not sbd for the fundraising?
See, there is an inherent problem happening on the ecosystem. All the projects are missing something really basic to make the sbd/steem system work: why accept steem as payment, since sbd was the token that was supposed to fulfill this role?