Marriott writers do not write well. They will eventually be sued because the policies written are not what they meant to write or are intentionally misleading. For example, on a regular rate, the cancelation policy states the following for a reservation beginning on September 18, 2015
As written, this means that you CANNOT cancel on September 17. This is NOT how Marriott actually enforces the policy though. Instead, Marriott means that you may not cancel AFTER September 17, 2015 or that you mean cancel anytime through September 17, 2015.
They're not going to get sued for being
more lenient than their poorly-written policy implies.