The thing with Aegean is that people only (generally) earn elite status on A3 because they don't fly very often- like I said, 19K for 3-year status is very generous. If they fly enough to hit US Chairmans or LH HON then they will obviously not be crediting to A3*. Hence A3's lounge bills will be limited.

*except for the lounge access, but the number UA 1K/US CP who also credit to A3 for free lounge access is probably limited, and more expensive than a RCC/US Club pass.