I have uncovered more misinformed mapping by Map-Finder: based on Way History: Αττική Οδός (601734050) | OpenStreetMap, the editor decided to declare most of Attiki Odos as untolled, despite the fact that toll=yes applies to ways to and from the toll booth. In doing so, many drivers risked being unwillingly tricked into paying tolls to access a way that isn’t tolled.
I don’t recall toll roads being tagged like what Map-Finder did: I thought we should tag them like in this example: that is, a segment of road has toll=yes if the all possible routes to get there require paying a toll beforehand.