no, the gdpr.eu website is not the official website of the EDPB, that's this one here.

the gdpr.eu website is maintained by the proton foundation, which is why it is, as you correctly recognized, a good resource for practical information about the GDPR.

"these ideas" boil down to "it always depends on the context".

that's exactly the point you keep missing: the GDPR cannot be generalized to make blanket statements like "usernames are always personal data" <--- this is a false statement.

and this is by design!

it's supposed to be contextual!

usernames are potentially, sometimes, even often personal data, but the law very specifically says that this is NOT always the case.

that's what the excerpt you quoted says: that these sorts of data are commonly considered personal data. whether or not something is personal data depends on the connected data.

with some, very limited, exceptions. for example: full names and addresses. those are actually always personal data.

the strange idea here is assuming that the GDPR allows anyone to make blanket statements without context.

also: STILL no explanation how anything in the article in any way relates to Fediverse services being somehow "illegal"?

how did you go from an article about "ad-tracking is illegal" to "the Fediverse is illegal"??

that's an Olympic level leap in mental gymnastics!