Hi Snail5930. This is a great question! You will receive the points for your paid room. When it comes to earning credit for multiple rooms, you can earn credit for up to three rooms. Below, you'll find how it is laid out in the terms and conditions.
"A Member is eligible to receive Points/Miles for a qualifying stay at participating Marriott brand hotels or Ritz-Carlton hotels for his/her room and up to two additional rooms. At least one of the rooms must be reserved and registered in the Member's name and the Member must pay for all rooms, which payment arrangement must be requested at time of hotel check-in. The Member must also stay in one of the rooms. To ensure Points are automatically posted to the correct Membership Account, the Member's Rewards Program Membership Number must be present on his/her room folio and up to two additional rooms, as applicable."