"What We Are Doing" under the "Cambridge Analytica" section is crap, i.e. lightweight or hypothetical (e.g. "we’re in the process of investigating every app that had access to a large amount of information before we locked down our platform in 2014").

By contrast, the same section under "Russian Election Interference" is well thought out. There's some hand-wavy stuff (e.g. "in the U.S. Senate Alabama special election last year, we deployed new AI tools that proactively detected and removed fake accounts from Macedonia trying to spread misinformation"). But requiring "every advertiser who wants to run political or issue ads...confirm their identity and location" and mandating the ads "show...who paid for them" is meaningful. That they're "starting this in the U.S. and expanding to the rest of the world in the coming months" is more encouraging. I'm also genuinely optimistic about their "tool that lets anyone see all of the ads a page is running" and "searchable archive of past political ads."

With Cambridge Analytica, a core component of Facebook's advertising business model is threatened. Hence the inaction. With Russia, Facebook and political advertisers' interests are aligned. Hence, action.