I give whatever I feel moved to give whenever I feel moved to give it.
I don't go to church on a regular basis, I only go when I'm moved by the Spirit anyway and I visit different Christian churches, Jewish synagogues, Buddhist temples, Spiritual Centers, etc, from time to time ...So, I don't follow any tithing demands that supposedly God is upset about if you do not pay. ..and your entire life will be cursed if you do not pay.
I give out of love, not fear.
Tithing is not a heaven or hell issue. It's simply a sign of being part of God's kingdom and a sign of Faith and trust. Too many ministers, unfortunately, use the command and principle to satisfy their greed. I have a wonderfully humble teaching pastor who is all about feeding the flock he is assigned with the word of God only. Others may not be so lucky. So i do understand your position. Honestly, if i didn't have a pastor like this, i would be hard pressed to find the will to give also.