I'll restrain myself from commenting on JW.ORG's perversion of this scripture - I'll leave that to others.
However, for lurkers and active Witnesses here, why not ask one of your local Glorious Ones to explain how these non-Scriptural words found their way into the Silver Sword, but don't appear in the original Greek, or even in the Kingdom Interlinear.
(2 Corinthians 9:13) "Through the proof that this relief ministry gives, they glorify God because you are submissive to the good news about the Christ, as you publicly declared, and because you are generous in your contribution to them and to all."
https://www.blueletterbible.org/Bible.cfm?b=2Co&c=9&t=KJV#s=t_conc_1087013