I don't think people understand that non-profits too need profits, they just don't take all of it home.
Non-profits need revenue, not profit.
But if your operating costs are more than your revenue (thus, no profit), who is keeping that non-profit afloat?
A non-profit organization can solicit donations big and small, via grants, memberships, and other common mechanisms.
A non-profit organization can also sell things at a markup. There are alarmingly profitable for-profit tote bag businesses riding the back of non-profits everywhere.
Like someone else has said in this thread. YC accepts non profits.