Unfortunately, as mentioned, consecutive nights at the same hotel, no matter the number, types, different rates, etc, between different reservations will all be treated as a single stay. The way around that is you have to switch hotels. If there are 2 Marriott hotels close to each other, you can switch between them and get multiple stays. In fact, I've had business trips with 5 nights where I would get 5 stays out of it just by switch between a couple of hotels every day. Might not work as well for a family vacation though. Another option if there is more than just you in the room, would be to have multiple reservations in different names/accounts. This would mean one of you could each get a stay or if you switched nightly, both of you could get multiple stays (if your trip is 4+ nights or longer of course.)