Update (9/19): Reddit is reporting three versions of the offer (targeted) depending on your Marriott status.
I was poking around last night at some Marriott hotels for a January trip to New Orleans (specifically, for a hotel I could BRG), and I stumbled upon the following Marriott Premier credit card offer during the booking flow:
Reward yourself with a $150 statement credit
- $150 statement credit after your first purchase,* including a Marriott®reservation or anything else. It will appear on your statement within 6-8 weeks. Price for stay and statement credit may post on separate statements.
- Plus 40,000 bonus points after you spend $2,000 on purchases in your first 3 months.*
Although you could go through the flow and collect the link yourself, it doesn’t seem to be unique so you can access the offer directly here.