Worked for me as well. Thanks for sharing!
from the T&C:
To be eligible for this bonus offer, you must activate by 09/15/20 11:59 p.m. E.T. You will earn a total of 10 points for each $1 spent, on up to $3,500 in total combined purchases, in the restaurant and gas station categories from 07/15/2020 to 09/15/2020. That’s 9, 8, 7, or 6 points on top of the 1, 2, 3, or 4 points you already earn on those purchases with your card, depending on the category and which Marriott credit card you are using.