[CommerceComet]

That seems like pushing it a bit. Would the church I go to refuse a corresponding tithe (hypothetically... I prefer the system of offerings as I prosper, not strict tithes) of $66.60? But to each their own spiritual comfort level.

Make the check out for $6.67 - a tithe and an offering. God sets the minimum at 10% but the maximum does not seem to be defined.

[HiTech RedNeck]

A literal follow-on to the Old Testament would assert what you have asserted.

The New Testament is much freer. It is voluntary, not legalistic, and as the Holy Spirit prompts. Money is a handy medium for giving back to the Lord, but there are other mediums such as service or miscellaneous chattels.

I look askance at legalism. It can result in giving too little a blessing rather than too much.