We've cruised about 30 times. More on Celebrity than any others, but also HAL, Princess, Royal. They just don't send out brochures the way Oceania does. I don't remember the last brochure I received from any of them frankly. I do get a quarterly bulletin from Princess from their loyalty club, Celebrity now sends that out digitally and pretty sure we've never gotten anything from HAL, but we only cruised with once.
Don't get me wrong, aside from the massive waste of paper it creates, I really don't care. It is helping to fill up the landfills.