The amount of votes required is definitely not 100%. That would be way too hard for any developer.

Our election algorithm looks at a lot of metrics before deciding whether to pass a project. Our goal is to pass projects that have broad community consensus that they meet the project requirements. We obviously want to fail projects that have obvious stability problems, or that don't do what the proposal says. We're working hard to make it difficult to game the system, and I'd be interested in any thoughts you might have to make things more fair.