I can see the WT running an article something like this soon:
Valuing Friendship Like Abraham
Before the New Covenant and before the Mosaic Law, Abraham was called God's Friend. While he was under no obligation to give a tenth of his wealth to Melchizidek (Genesis 14:18-20), he did so because of his friendship with God's anointed.
Likewise today, the great crowd of other sheep are not under Mosaic Laws that stipulated giving a tenth to God's anointed priest class under penalty of death. However, as God's friends what would prevent Jehovah's people from making this a personal goal out of appreciation for such life-giving friendship? True Christians today follow examples like Abraham, not only with obedience to God's Laws, but also with their valuable things out of respect for their friendship with God. Some may even wish to exceed what Abraham gave.
The Jonadab class has unswervingly upheld the direction from the Faithful and Discreet Slave Class for more than 100 years now. They have rejected friendship with the world which makes them enemies of God; Therefore, there is every reason to believe that the Great Crowd of "other sheep" will continue to demonstrate their loyalty and friendship with God's anointed as we continue to refine our understanding of what it means to be friends with God, like Abraham.