That sounds all noble and religious, but you have ignored that fact that YOU are not doing what Scripture requires for the blessing in Malachi either. So why should you expect a blessing for NOT doing what God commanded, but doing what YOU wanted to do instead and claiming that YOUR decision was God’s command?
"Will a man rob God? Yet you are robbing Me! But you say, 'How have we robbed You?' In tithes and offerings. "You are cursed with a curse, for you are robbing Me, the whole nation [of you!] "Bring the whole tithe into the storehouse, so that there may be food in My house, and test Me now in this," says the LORD of hosts, "if I will not open for you the windows of heaven and pour out for you a blessing until it overflows. "Then I will rebuke the devourer for you, so that it will not destroy the fruits of the ground; nor will your vine in the field cast [its grapes,]" says the LORD of hosts. "All the nations will call you blessed, for you shall be a delightful land," says the LORD of hosts. [Malachi 3:8-12 NASB]
"You shall surely tithe all the produce from what you sow, which comes out of the field every year. "You shall eat in the presence of the LORD your God, at the place where He chooses to establish His name, the tithe of your grain, your new wine, your oil, and the firstborn of your herd and your flock, so that you may learn to fear the LORD your God always. "If the distance is so great for you that you are not able to bring [the tithe,] since the place where the LORD your God chooses to set His name is too far away from you when the LORD your God blesses you, then you shall exchange [it] for money, and bind the money in your hand and go to the place which the LORD your God chooses. "You may spend the money for whatever your heart desires: for oxen, or sheep, or wine, or strong drink, or whatever your heart desires; and there you shall eat in the presence of the LORD your God and rejoice, you and your household. "Also you shall not neglect the Levite who is in your town, for he has no portion or inheritance among you. "At the end of every third year you shall bring out all the tithe of your produce in that year, and shall deposit [it] in your town. "The Levite, because he has no portion or inheritance among you, and the alien, the orphan and the widow who are in your town, shall come and eat and be satisfied, in order that the LORD your God may bless you in all the work of your hand which you do. [Deu 14:22-29 NASB]