Xandrios Yeah, I saw that too and was initially very interested seeing that even DUS-ATH is there! However it is extremely restrictive.
Further restrictions to be mentioned: The other passes (with the exception of that Greek island pass) are good for 365 days. This one is supposed to be valid for flights between January and October (so 10 months), but its validity doesn't even begin at the beginning of January or end at the end of October since those 2 (first and last) weeks are out!
In total there are nearly 4,5 months out of the 10 months "validity" of the pass, that are in that "black out" zone.
Needless to say every bit of "high season" and more are excluded.

So it's a pass for 3 round trips within an added total of ~5,5 months, which is actually a higher frequency than the 12-flight pass, which is valid for 12 months...!
But yeah, it is an appealing offer at first sight and surely there will be one or two target groups that could make use of it.