If I want it to keep going, I have to help. Since that time, I have donated back much more than they gave me. I thought they had an unwritten policy of not hiring people of my religious faith for their faculty, no matter how well-qualified they might be. Then I began seeing darker faces in the publications and learned of Jews at least being interviewed for jobs. Now I contribute again.
People sometimes behave strangely about their participation in fundraising.
When I was chairing financial development for NASW a few years ago, we ran receptions all over the United States. We found that many people would show up for the receptions, eat the food, drink the drinks, and contribute nothing. They clearly came with no intention of helping. That's unfortunate and usually remembered by those who had expected help and didn't get it. Don't be insulting with the size of the gift, even though the participation rather than the amount counts a great deal.