You need to create valuable calls to action and
continuously produce content in order to maintain
their attention.
Recurring subscription models help with this, as "letting the subscription continue" then becomes the easiest thing to do.
Building a community helps retain people as well. This is easier said than done, since this aspect alone does require some effort and constant monitoring. Simplest examples of this would be subscriber-only Discord servers and/or webforums.
There are moral considerations to each of those strategies, of course. Canceling a recurring subscription shouldn't involve jumping through hoops. And "ostracizing/shunning lapsed members" is more or less a How To Run A Cult For Dummies tactic, so ask yourself if your subscribers-only community is operating like that.
Building a community helps retain people as well. This is easier said than done, since this aspect alone does require some effort and constant monitoring. Simplest examples of this would be subscriber-only Discord servers and/or webforums.
There are moral considerations to each of those strategies, of course. Canceling a recurring subscription shouldn't involve jumping through hoops. And "ostracizing/shunning lapsed members" is more or less a How To Run A Cult For Dummies tactic, so ask yourself if your subscribers-only community is operating like that.