It would just be a useful reminder of that fact. Remember: you're trying to sell voting to someone who doesn't normally vote. It's easier to sell it as being a one-off thing versus sell them on voting in all future elections.
> It's easier to sell it as being a one-off thing versus sell them on voting in all future elections.
So a promise to permanently and irrevocably change the country? If it is truly one off that is what it would have to be, which is not possible via normal legal mechanisms in the USA.