It is never ever about the money. Offer them a small bonus, but not at full 20k value. If these are experienced investors and you want them around, let them k

It is never ever about the money. Offer them a small bonus, but not at full 20k value. If these are experienced investors and you want them around, let them know you value them, but as much as you want to give them a bonus, you want them to know that they realize you value the relationship more than the bonus you are able to offer, as a "recognition" and "thank you" for continuing to have faith in you. Tell them you don't care whether this is the norm or not. But you prefer that it is not the norm, because you want them to feel good about this, and not because it is an entitlement. Then apologize that you couldn't offer more.