OP of the aforementioned Facebook Ads Prank here. Thank you for remembering it all these years and sharing it here!

Yes, it was discovered 7 years ago (by many) and Facebook has continually lied about it being patched.

Here's a more recent overview of all their lies regarding micro-targeting:

https://thetyee.ca/News/2019/05/07/Facebook-Privacy-Busting-...