I have shewed you all things, how that so labouring ye ought to support the weak, and to remember the words of the Lord Jesus, how he said, It is more blessed to give than to receive. Acts 20:35
Taking the position of a giver is the secret to kingdom prosperity. It might look as if you are the one who is letting go but from the light of God's word that little act of generosity just open a door for inflow of God's blessings.
Never stop your act of generosity the fact you haven't see the blessing, does not mean it is not going to come. Keep on with the good work; God's word cannot lie.