For the record the tithe was not soley for distribution to the priests, it was also for the stranger, the widows and the orphans.
The question wasn't whether you accept the principle of tithing, it was does the Lord promise a blessing on those who do? The bible does indeed promise blessings for those who declare their faith in this manner and is evidenced through the testimony of those that do.
THE FIRST TITHE
Leviticus 27:30-33 defines this tithe as a tenth of crops and animals in herds and flocks.
Numbers 18 gives the ordinances, or instructions, for this tithe, and commands this tithe be taken to the Levites.
Purpose of this tithe: to support the Levitical Priesthood.
SECOND TITHE
Deuteronomy 14:22-27: aka The Festival Tithe - a tenth of crops, plus add to that the firstborn animals, and take for the yearly feast.
Purpose of this tithe: that thou mayest learn to fear the LORD thy God always
THIRD TITHE
Deuteronomy 14:28-29: aka The Three-Year Tithe aka The Poor Tithe - a tenth of crops, kept at home, and invite the Levites, widows, orphans, stranger to eat.
Purpose of this tithe: to feed the poor.
Malachi 3 refers to the first tithe only. The blessings referred to for tithing was RAIN for the whole nation. It was not speaking of individual blessings - rain for those who tithe and no rain for those who don't. The blessings were FOR THE WHOLE NATION.
The curse referred to in Malachi does not apply to Christians. Galatians 3:13 Christ hath redeemed us from the curse of the law, being made a curse for us
Pastors usually start with Malachi verse 8 instead of verse 7. Malachi 3:7 (KJV) Even from the days of your fathers ye are gone away from mine ORDINANCES, and have not kept them. Return unto me, and I will return unto you, saith the LORD of hosts. But ye said, Wherein shall we return?
Colossians 2:14 (KJV) Blotting out the handwriting of ORDINANCES that was against us, which was contrary to us, and took it out of the way, nailing it to his cross;
OLD TESTAMENT
Proverbs 3:9 (KJV) Honour the LORD with thy substance, and with the firstfruits of all thine increase:
NEW TESTAMENT
2 Timothy 2:6 (KJV) The husbandman that laboureth must be first partaker of the fruits.
Are you aware that the tithe was paid to THE LEVITES, not the priests? The Levites were the ushers, singers, musicians, janitors, etc. - the servants of the priests. The Levites were then commanded to give a tenth of that tithe to the priests.
Are you aware that the priests and Levites only worked at the Temple about two weeks per year, on a rotational basis? NOT FULL TIME. The priests and Levites were divided into 24 "courses". See First Chronicles 24 for the priests and chapters 25 and 26 for the Levites. Each course only ministered in the Temple one week out of twenty four (1 in 24), and, depending on how many families were in each course, each family only ministered in the Temple two or three days during its courses week of ministry.
The New Testament teaches generous, sacrificial giving, from the heart, according to our means. For some, $1 might be a sacrifice, while for others, even giving 50% of their income might not induce a sacrifice. In the Old Testament, ONLY the farmers tithed, and it was equal percentage (a tenth). The New Testament teaches the principle of equal sacrifice instead of equal percentage. Equal sacrifice is much harder to achieve, if not impossible, than giving ten percent.