Article by TwoBirds on EDPB Guidelines on targeting social media users (draft)

https://www.twobirds.com/en/news/articles/2020/global/edpb-guidelines-on-targeting-social-media-users

includes summary of criteria proposed by EDPB in context of “Data manifestly made public by the data subject”.
Also distinction by EDPB between explicit and inferred/combined special categories of personal data.
Assumptions or inferences regarding special category data would also constitute special category data