Have invitations been disabled?

I just noticed that all of the storylets that allow one to invite a friend from the Surface seem to have vanished; on the cards that normally grant them, the invitation options are gone. As near as I can tell, there seems to be no way left in the game to invite a new player to FL – which seems like big news, but I can’t find any announcements about this. Is this a side-effect of the recent issue with social actions, or …?

They’ve been disabled since the release of the iOS app in April due to syncing issues.

How tragic! Thanks for the explanation.