Amazon Fresh (and not While Foods) just appeared on my 3x Chase cards, bit inconsistent:
CSR: Earn 10% back on your Amazon Fresh purchase, with a $9.00 back maximum.
United: Earn 10% back on your Amazon Fresh purchase, with a $10.00 back maximum.
CFU: Earn 5% back on your Amazon Fresh purchase, with a $5.00 back maximum.