Will have SPG Gold status soon based on spending on my SPG Biz card. Will then be matching to Marriott Gold status. When you match into Marriott Gold status, do they credit you as having 50 elite night credits (plus whatever paid nights you already have in your Marriott rewards account)?

Plan was to match SPG Gold to Marriott Gold, get the Marriott chase card (15 additional elite night credits, for a total of 65), and then just stay at Marriott at least 10 nights to hit the 75 figure for Platinum status. But I'm unsure if matching to Marriott immediately puts me at 50 or whether I am misunderstanding.