Why are you drawing such fine distinctions? First of all “tithe” merely means “one tenth”. If you’d rather I use the words “one tenth” instead of “tithe”, that’s fine. Second, who cares whether you call it a “free will gift of love” or a duty? Either way, its a good thing to do it, no? Finally, you still haven’t answered my question: why would one be less inclinded to give one tenth now than in Old Testament times, considering that the Saviour has now come?
Ask your question to someone it applies to. For you tithers to assume I give less than 10 percent is pettiness on your part.