In that situation, I guess there's not much power Company A has with regards with Company B, right? Unless Company B is worried that they'll have a future relationship and thus will be willing to submit some kind of audit.

Zuck's announcement seems to have a decent outline -- start with investigating apps with access to large amounts of data, audit apps with strange behavior. But after a year, after the CA (and other) controversies are forgotten, what I was thinking was that FB should be doing regular, random audits/investigations, and publicize the punishment.

I don't mean identifiable shaming, e.g. "Last week, we banned Jane Smith and her Flappy Farm app for misusing the data of 3,000+ users". But maybe weekly/monthly tallies of apps that were shut down or sanctioned, and a breakdown of the reasons why, and users affected, etc. Every once in awhile, an app maker might post a "We Fucked Up" article on HN, which helps even more in reminding people of TOS.

From what I've seen, tech companies tend to be understaffed on enforcement and compliance, relative to their user reach. Was the "certification" anything more than a checkbox in an emailed Word doc? I expect that's one area where they could improve their diligence. I would argue that if you have a high volume advertiser who has already broken a TOS and continues to use the platform, that type of hands-off certification is deliberately negligent. Anyway, we'll find out more details from their FB account manager in the coming months.