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Today (Mon. Mar. 5) he said, "We are going to downsize BMO Field for the Argos games", at 28:25 into this.
http://www.tsn.ca/radio/toronto-1050/landsberg-in-the-morning-march-5-2018-hour-3-1.1017777

I suppose sections that were closed off do not have to be swept after a game, but otherwise it's almost entirely about optics and not about cost savings. I don't think it really makes much...