So, commitment score slowly decreases with time. In addition, a person can gain reputation if they refer someone. So, what happens if I un-commit a proposal, and then re-commit, as far as the people referred to the project? Do I still get the benefits if they follow through on their commitment?
You don't need to uncommit and recommit to refresh your commitment score on a proposal. You only need to visit the commitment screen on Area 51, and that renews your commitment score and undoes all your commitmnent decay..