Ah right. I guessed it was only downloading new data as needed.
It used to be that crew internet on these cruise ships charged per minute. That way it would be a race against the clock, so I'd visit loads of websites and open loads of tabs, then disconnect, and then read all the pages. I'd chat as quickly as possible to Juliane, and usually FaceTime would be the quickest and easiest way.
Now being charged for data, I can stay connected for ages and as long as nothing starts trying to download updates in the background (I've turned all such options off) I can stay online as long as I want, and chat as long as I want via Messenger, and it hardly uses anything. And because this forum hardly takes any data either, I've been able to keep up to date and join in conversations I wouldn't normally have bothered with on previous work trips.