We do miss something. It's my understanding that if we don't reach your goal, the donations are just rolled into the general dev donation fund. That's all fine and dandy, except that some of us (myself included) prefer to fund specific work that we'd like to see expedited.

Does that make sense? It's in few people's interest to contribute to your proposal if it's unlikely to reach its goal. And it's in few people's interest to contribute to any proposal if the funding system habitually allows unreasonable funding goals.