I found a similar thread here, where it sounds like it worked for Chase: Buying Disneyland tickets AT Disney hotel checkin...

I'm looking at a stay at either the Courtyard Marriott or another property in the area to visit Disneyland. I'm curious if anyone has successfully bought tickets from the front desk and earned the 10x points on them as an incidental purchase at the hotel? Or is it processed separately and treated simply as a park purchase?

Thanks!

Update for anyone finding this later, Marriott properties near Disneyland sell discounted tickets, and you can charge to your room (and earn 6x points).