Marketing Examples email list just hit the 13,000 mark. Here's the last 30 days growth. And a couple of highlights:

A week ago I went backwards in subscribers for the first time. 50 unsubscribes. Just 25 new subscribes. A net loss.
Setbacks are opportunities. I learnt that people find long emails daunting ...
My unsubscribe rate is between 0.2-0.4% per email. With a list of 13k this is ~40 people.
To balance unsubscribes I encourage subscribers to forward to friends. If you write great email's good this works:

The focus of Marketing Examples has always been quality at all costs. The downside is fewer articles and less organic traffic.
But the upside is if you have a reputation for quality you expose yourself to big growth spikes.
e.g. - A fortnight ago Noah Kagan shared my site with his big email list. This doesn't happen to sites which prioritise quantity over quality. A tweet from Courtland comes to mind:

if you want to grow an email list just get started is the best advice out there.
Email lists don't “blow up” in the way that YouTube channels do. It's a slow game and it can feel like you're plodding on. But if you plod on long enough you'll make it to several thousand subscribers.
And finally, if you'd like to learn more about marketing from short pratical tips, please do check out Marketing Examples and also perhaps the email list.
Any questions let me know in the comments :)