This is the key. My gift, whatever the size of my sacrifice, is given as unto the Lord. They are benefitting, yes, but that's what Grace is. Grace is getting what we don't deserve. God's Grace is evident in my life every moment of every day.
Unmerited favor is another term for it.
If we give our gifts as unto the Lord, we don't care how it's spent. It doesn't belong to me once it's given. We were sent. To whom much is given, much is required. It takes a lot of money to do what we do.