Not to beat a dead horse but a recent White Horse Inn podcast had all of the hosts agreeing that the tithe was an Old Covenant institution and that the New Covenant command was giving cheerfully. However, they did say (if I recall correctly) that the tithe was a good yardstick if you wanted to use it.

Peter

If you believe what you like in the gospels, and reject what you don't like, it is not the gospel you believe, but yourself. Augustine of Hippo