That should be the last reason we do it. For it is the most self serving reason.
It’s like the principle of obedience in general. There are 3 basic reasons one obeys God.
1. Fear (You fear you will burn in hell if you don’t keep the commandments)
2. Obedience for obedience sake (you obey because it’s expected of you, like the pharisees)
3. Love (you love God and are willing to do all things for Him and His kindgom’s sake)
I like the third reason the best!
8-)
I did not see THIS listed in your 'reasons':
2 Corinthians 9:6-7
6. Remember this: Whoever sows sparingly will also reap sparingly, and whoever sows generously will also reap generously.
7. Each man should give what he has decided in his heart to give, not reluctantly or under compulsion, for God loves a cheerful giver.