No only paid stays.

"Registration of your Marriott Bonvoy® Account is required. Marriott Bonvoy members who register for this promotion by April 14, 2025, will earn 1,000 bonus Points per eligible paid night, plus one bonus Elite Night Credit per eligible paid night, during the 77-night promotion earning period. The promotion earning period is for eligible paid nights completed between February 11, 2025, and April 28, 2025"