Originally Posted by
gcja
2. From which date, can I use Marriott gift card in Starwood hotels?
Delta is a Marriott brand, not a Starwood brand. But you can't use a Marriott gift card at the Delta Garden Grove CA, because "we're too new" (now over 3 months with the Marriott program, but still no stays post, can't accept Marriott gift cards, etc, etc).
So don't even assume you can use Marriott gift cards at every Marriott program property. Many yes, every no.