I have another question about this:
So what happens if you make the full amount of progress for the year that you pledged when the competition started, and then derail multiple times? This could happen because you retroratcheted, or because you made the goal harder.
For instance, you pledge 1/week, get your 52 in quickly so you have a large buffer, then you increase your rate to 10/week or retroratchet your buffer down, and then stop meeting your goal.
On one hand, you met your pledge, so you should have clinched a win, even if you derailed.
On the other hand, it seems wrong to count it as a win after derailing.