Marriott Credit Card provides 10 nights credit each year to earn Lifetime night status. Do I also earn night credit it I spend a certain amount on the card each month too?
Which credit card are you referencing? Things are changing with the cards as well as the whole program.
You must be referring to none of the Premier cards, as the old blue card provides 10 elite night credits. If you have the Marriott Rewards Premier Visa (black), you earn 1 elite night credit per $3,000 spent (monthly spend has nothing to do with it), until they either remove that benefit or the card is discontinued, as you no longer can apply for the Premier Visa.
You will earn 15 elite night credits for old Premier personal and/or Business Premier cards you have in 2018, and starting in 2019, you will earn 15 elite night credits MAX on any of the current 8 US Marriott cards (7 after 26 August 2018) that will exist (assuming they all still exist): Marriott Rewards Premier Visa, Marriott Rewards Premier Plus Visa, Marriott Rewards Premier and/or Premier Plus Business Visa (all Business Visas will be Premier Plus starting 26 August 2018), Ritz-Carlton Rewards Visa, SPG AMEX, SPG Business AMEX, and SPG Luxury AMEX.
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