To do this you can generate your own unique referral link.
Given this fact, I am not sure as to what kind of content should I am for.
Many subscribers will gladly contribute, but not all of them will be aware of how to do it at first.
Some creators do this weekly so they know that the bulk of their work is automatically being posted and all they have to do is log in to respond to messages and engage with fans.
The feature also enables you to send welcome messages to your new subscribers, as well as mass message your entire fan base.
For instance, you may give a 20% discount for fans opting to subscribe for three months.