"We chose to support the opt-in group to be sure there is enough money to pay for the process to continue. One way to lose is to run out of money and the longer it takes the more likely that could happen."
Any idea how long they will last from the cash given to them by the opt ins? Let's see, you gave them $0, Don gave them $0, Jimmi gave them $0, the opt in committee gave them $0 - not sure of my math but I think that adds up to $0. Now if I opted in that would add another $0. That could last a very long time - at a guess maybe 0 days plus/minus 0 days.
You need to come up with a better inaccurate justification. How about: opting in is like buying a lottery ticket but one which costs you nothing up front and you only pay for if you win. Now that sounds like a great deal (even if it isn't quite true).
You are welcome.