yes, but it's really unclear like I wouldn't even rely on the "no further restrictions" clause being valid/legally binding and due to how it works pretty much

yes, but it's really unclear like I wouldn't even rely on the "no further restrictions" clause being valid/legally binding and due to how it works pretty much any previous case trying to enforce it I'm aware of failed (but on a technicality _not_ applying here). (As an example for a invalid clause, the automatic contract voiding on violation clause is not valid in some(all?) EU countries!) and then the definition of derived work, especially in the EU and with GPLv2, is much less ... clear ... then what the FSF likes to claim. so I think you really would need to ask a lawyer in any situations where it does matter