I've published the newsletter every week consistently, trying to find the best articles to provide as much value as possible to my audience, and the newsletter kept growing steadily.
I considered 2000 subscribers to be the first significant milestone, as at that point, I had to start paying for my Mailchimp plan.
At this point, I didn't believe that I'll be able to make some money with it and was genuinely concerned about how I could cover my costs if the newsletter continues growing.