Originally Posted by
docr775
"A maximum of 15 Elite Night credits will be awarded per Marriott Loyalty Program member even if the Marriott Loyalty Program member has more than one Marriott Rewards, Starwood Preferred Guest, or Ritz-Carlton Rewards credit card account or is a member of more than one Marriott Loyalty Program."
Marriott Rewards Credit Cards
So no matter how many cards we have, it will be capped at 15 nights.
I'm hoping that that quote was issued directed at people with multiple cards. Otherwise, they'd be taking away a large incentive for people to spend much on the card.