I am serious. It's not about leisure travel or your summer vacation. It's not about tourism or the Greek economy.
It's about willingly release tons more of CO2 to get status.
AMS-TLL is 914 miles.
AMS-ATH-TLL is 2.838 miles.
TLL-HEL is 62 miles.
TLL-ARN-HEL is 489 miles.
Even if we suppose that nobody here gives a damn about the next generation or the ecosystem, Diner's, Amex, or Priority Pass might be cost-efficient solutions, worth considering.