But it's public info?

> When Facebook said Ad Observer was collecting data from users who had not authorized her to do so, the company wasn't referring to private users' accounts. It was referring to advertisers' accounts, including the names and profile pictures of public Pages that run political ads and the contents of those ads.

It's all on https://www.facebook.com/ads/library/. Scraping just lets them analyze it.

The comment that I'm replying to argued that facebook is concerned about the privacy of advertisers, and I argued that this concern is legitimate. If you don't agree that facebook is concerned about the privacy of advertisers, maybe you should reply to the comment that actually made this claim?

I don't agree with your claim. I'm arguing the concern is not legitimate.