Cutoff date moved back. Augur moved the cutoff date from September 15, 2019 to January 1, 2020. They added further guidance here and changed the Augur front-end to hide "unsafe" markets.
The majority of open markets are "unsafe". 87% of the book (552 ETH, or ~USD $118K) is in 155 "unsafe" markets.
Guesser market resolves as Invalid. A copy/paste relic caused the unheard of event for Guesser's usually immaculate Augur market creation team.
DeFi market on Guesser generated 14 ETH of volume. "Will the Total ETH Locked in Maker be over 1.4 million by the end of September 14 2019 (UTC)?" Reported outcome: yes. (Barely).
Note: the "last week" book size statistic has been adjusted to exclude some activity that was making w/w numbers slightly off.