I do wonder if this is entirely true. Some print magazines I would have liked to subscribe to made it unpalatable in one way or another (dubious cancellation mechanisms etc.)
I looked at subscribing to several magazines within the last few months. One had no explicit cancellation mechanism, one would have been delivered to a courier office several miles away and this one was no longer accepting subscriptions.
I'm sure it's hard to make this work - but perhaps there are self-inflicted speedbumps here as well?