https://www.buzzfeed.com/janelytvynenko/facebook-ads-pages-transparency-trump-overseas

Facebook temporarily turned on a new feature that enabled users to see previously hidden information about a page, such as when it was created, how many people manage it, and where those people are based. This new information was briefly shown in a box called "Page History" that was part of the ad transparency product the company is currently testing in Canada ahead of a rollout in the US in advance of the 2018 midterm elections.

However, after being contacted about the Page History box by BuzzFeed News, Facebook turned off the entire "View Ads" product in Canada. It did not initially respond to questions about why the feature was turned off, but the company's VP of local, Alex Himel, tweeted after this story was published, "We mistakenly launched an early test to people in Canada and Ireland. We are still working on the product so have since rolled it back."