I backed for the highest pledge level when the campaign launched so that I could get one of each large and small pin design (I originally thought that they would all get funded). Now that the campaign is nearing the ending date, I'm not sure if I should stay pledged to that tier or downgrade to a lower tier while add more pins through add-ons in anticipation of not all the stretch goals being reached by the ending date. Should I stay pledged to their higher tier?