What if you could have other websites out recruiting subscribers for you, 24/7?
That’s basically how co-registration works. You make arrangements with partners to offer your email newsletter (or blog posts via email) for potential readers to subscribe to. If your offer is compelling enough, the subscriber will be automatically added to your email subscription list after they opt-in.
There are various ways to go about this, some better than others, but each with unique considerations to keep in mind. There are paid arrangements, barter arrangements, and sometimes hybrids. Keep in mind that this is in no way buying or trading email addresses — it’s simply a form of off-site advertising that offers an opt-in subscription to your content, plus any relevant bonus reports or tutorials that you may offer as an enticement.