Online giving is about presenting every opportunity and convenience to do what God has already commanded us to do. You can also pay for upcoming events here if you are like most of the world and rarely carry cash. Giving is one of the four tenets that the Church on 68 understands we must come together in for the church to function as God intends. God's command in Malachi 3:10 exemplifies this:
This signifies the obvious natural things that money can accomplish when given to the church where you are connected, but the Church on 68 lives in the revelation that giving has nothing to do with the money and everything to do with a heart posture. It shows God we acknowledge He is our provider and that we trust Him with more than just our salvation.
It would be enough if that was all there was to the command, but God actually promises more than we can comprehend if we simply obey.