The voice of Jesus informed David—mainly because it instructed the apostles 2,000 a long time ahead of, “Freely you have obtained; freely give.” As a result David has not charged for his time, instructing or any of the many elements he provides absent, but is supported entirely by love offerings. https://www.youtube.com/playlist?list=PLXR6KmNsDBjSQgdIOJ1JFzHP8923tHwyl