[catgirlinspace]

Perhaps they allowed Apple Push Notification service so their own app can receive notifications?

[pbhjpbhj]

Allowing inbound messages is pressure on people to buy service so they can respond. I'd guess it was for evil marketing reasons.

[josephg]

Ah yeah that makes sense. They have messaging built into their app so you can message friends and family while onboard the ship. I didn't use it - but of course, if they block APNS, messages wouldn't be able to show up on the lock screen.