Being enriched in every thing to all bountifulness, which causeth through us thanksgiving to God.
Compare 2 Corinthians 9:8.
Bountifulness, х haploteeta (G572)] - 'singleminded liberality' (2 Corinthians 8:2, note); 'simplicity' (Romans 12:8).
Causeth through us - literally, 'worketh through us,' as the distributors.
Thanksgiving - on the part of the recipients.