upgrader: Thanks for confirming the benefit using your card number.
I will get the FlexPerks credit card for this benefit. I estimate the value of a FlexPerk point as 1c if redeemed for cash equivs and say 1.75c if redeemed for airfare through their website, so this 3x equals a rebate of between 3-5.25c per $1 charitable donation on the card.
Only question is where in my application queue I will put this card versus the other big upfront bonus cards I want to get shortly as well!