Keep the 1/3rd of the company you are entitled to today, and make sure the other two founders stick around by creating a new allocation of shares that will have a vesting schedule, and will dilute you down fairly over time. There's nothing to stop the other founders from doing the exact same thing you are doing - leave and retain the company. Give them a compelling reason to stay.
Let's say OP decides to play unfriendly hard ball and hold on to his 33% of shares. Could the remaining two partners force through a new allocation of shares, vesting over time but only to active members, which would dilute OP to near zero? I am asking about who gets to decide what is considered fair dilution. Assuming good will on all sides, I like the idea of your suggestion. Assuming non-cooperation, I am wonderin…
In the same vein, they can't raise the $500k and then immediately dilute the investors. That's also theft, called fraud.
He seems to have shown a lot of good faith in this matter so far.