Doesn't matter. The whole point in the 20% projects is not to ensure rewarding best projects, but to reward trying. Because eventually the good projects will flush out.

If you say you will punish failed 20% projects. Nobody is going to buy into a concept where you people are likely to be punished for failing to try and do something good for the company in the spare time.

I don't think michaelochurch did a 20% project, which is why it's interesting that he speaks so authoritatively on what happens to someone with one.