Please merge if there is a suitable thread, I couldn't find one.

Basically I looked through the terms and conditions of marriott branded credit cards in Korea, since I can open CCs here too and it seems that there's nothing overlapping that would prevent me from earning elite night credits from Korean cards on top of the 30 I'm getting from US cards.

Does anyone know if there's anything that prevents this? Ignoring whether it's financially worth it, I'm curious if there's something that makes it not work.