So just for clarification on the wonders of delight 2000 points credit card promotion:

Are stays booked prior to registering for the promotion valid? Is the max you can earn from this 2000 points total or would you earn 2000 points for each subsequent stay.

Edit: Actually I answered my own question by reading the terms

When you register for this promotion between October 7, 2021 and October 14, 2021 you can earn 2,000 bonus points after you book and complete a stay at participating Marriott Bonvoy properties by November 21, 2021. You will earn the 2,000 bonus points on one eligible stay. This offer is capped at one stay per member, even if you hold multiple Marriott Bonvoy Credit Cards.

So 2000 points max, must be booked after registering. Great.