I'm trying to use one of my Amex offers before it expires on March 31....
Get 20% back on purchases, up to a total of $50

- and my next hotel stay won't be until April.

I'm assuming that buying a gift card online won't trigger the $50 credit?

So my next idea was to visit a Marriott hotel in NYC and buy a physical gift card in person at the counter, but I'm not sure which properties actually participate and do this. Hoping to save myself a million phone calls or running around the city and see if anyone here has personal experience doing this in New York or advice on which hotel to visit.

(I have already considered reaching out to an April hotel to pre-pay that reservation but my plans are too unreliable and I can't lock myself into a prepaid situation.)

Thanks all!