To be precise, it isn't "explicitly a legitimate use of the motion", and it is also incorrect to say, as in post #1, that “to simply get more debate time … is clearly expressed in RONR as being one of the uses of the motion.” RONR merely observes (on p. 128) that the making of this motion "enables members who have exhausted their right of debate on the main question to speak further because, as explained under Standard Characteristic 5, the motion to Postpone Indefinitely, though technically a new question, necessarily involves debate of the main question."